A lot of things are hereditary and 'football genes' might just be one of them considering the number of families that are able to produce multiple professional players spanning two, three or sometimes even four generations.
More than just fathers and sons, of which there are plenty of famous examples - Johan and Jordi Cruyff, Cesare and Paolo Maldini, Juan Ramon and Juan Sebastian Veron to name just a few - this is about fathers, sons, grandfathers and brothers as well.
Jorge Higuain was an Argentine defender who's career spanned three decades from 1976 to 1992 and took in spells on both sides of Argentina's fierce Superclasico rivalry with Boca Juniors and River Plate.
He also had two footballing sons. One, Gonzalo, is the Higuain family's most famous individual following his career in Europe with Real Madrid, Napoli and Juventus, the latter paying €90m for him last summer to make the striker one of the expensive players in history.
Federico Higuain is Jorge's other professional offspring. Like his father, he played for River Plate, albeit only sparingly, and has enjoyed his most consistent run with Columbus Crew in Major League Soccer after moving to the United States in 2012.
The Vladimir Weiss who started his professional career with Manchester City and has been a prominent player for Slovakia at two major international tournaments, is technically Vladimir Weiss III as he shares a name with his footballing father and grandfather.
The first Vladimir Weiss was a centre-back who had a club career in Czechoslovakia in the 1960s and won an Olympic silver medal in 1964.
Vladimir Weiss Jr, also played at club level in his homeland in the 1980s and 1990s, representing Czechoslovakia and later Slovakia at international level. More recently he's found success as a coach and was the man who took Slovakia to the World Cup in 2010.
Arsenal and Crystal Palace legend Ian Wright, who remains the Gunners' second all-time leading goalscorer, was a father before his professional football career had even begun after formally adopting the son of his then girlfriend in the early 1980s.
That was Shaun Wright-Phillips who had a successful career with Manchester City and was later a Premier League champion with Chelsea. Ian fathered his own child, Bradley Wright-Phillips shortly after and both brothers were formerly colleagues at New York Red Bulls.
Ian also has a cousin, Jermaine Wright, who notably played for Ipswich Town in the Premier League and UEFA Cup and later Leeds and Southampton among other clubs. Drey Wright, son of Jermaine, and Ian's nephew, has played for Colchester United since 2012.
Football success spans two generations in the Alonso family. Xabi Alonso recently announced his retirement and will soon end a glittering career as one of the most decorated players of his generation at club and international level.
His father, Periko Alonso, was a two-time La Liga champion with Real Sociedad in the 1980s, and then again after moving to Barcelona, where he spent three seasons and was a team-mate of Diego Maradona for a short time.
Periko's other son, Mikel Alonso, also has ties to Real Sociedad, like Xabi too, and briefly spent some time playing in England with Bolton Wanderers and Charlton Athletic.
7. Alonso (II)
Chelsea wing-back Marcos Alonso is a product of Spain's other famous Alonso football family. His late grandfather was former Real Madrid defender Marquitos, winner of five consecutive European Cups with Los Blancos between 1956 and 1960.
Marquitos' son, commonly referred to simply as Marcos, was also a famous Spanish footballer. A winger in the 1980s, he enjoyed most of his success with Barcelona where he spent five years and was a European Cup runner-up in 1986.
Marcos had youth ties to Real Madrid where his father was a legend, while Marcos Alonso also started out at Real and played one first-team game in 2010 before moving on to Bolton and later Fiorentina.
Pierre-Emerick is currently the most famous name of the Aubameyang clan. The Borussia Dortmund star, who has been one of the world's best strikers for the last few years, also has a footballing father and two professional half brothers.
Pierre Aubameyang was a Gabon international in the 1980s and 1990s. He spent most of his club career in France, but later migrated to Italy and eventually set up his family there. Catilina Aubameyang and Willy Aubameyang both started out at AC Milan as a result.
Neither made the first-team grade at the San Siro, going on to play for various clubs in Europe and Africa. And nor did Pierre-Emerick. He was sold by Milan in 2011 and made his name at Saint-Etienne in France instead.
Brothers Andre and Jordan Ayew both arrived in English football in the summer of 2015. Andre joined Swansea on a free transfer from Marseille, while Aston Villa paid around £9m to prise Jordan, also formerly of Marseille, away from Lorient.
Both have since moved on as Andre became West Ham's record signing in a £20m last summer, before, somewhat confusingly, Jordan replaced his brother at Swansea. Another brother, Ibrahim Ayew, is also a professional footballer and another Ghana international.
Their father, Abedi Pele, is even more famous and remains one of African football's greatest exports to date. The midfielder was a three-time African Footballer of the Year in the early 1990s and a Champions League winner with Marseille in 1993.
When Javier Hernandez played for Mexico at the 2010 World Cup, he became the third generation of his family to represent the country on the planet's biggest international stage.
Now with Bayer Leverkusen after leaving Manchester United, the striker is the son of Javier Hernandez Gutierrez, a midfielder who spent 19 years with various clubs in Mexico and had an 11-year international career that included playing at the 1986 World Cup on home soil.
The younger Javier's maternal grandfather, Javier Sr's father-in-law, was Tomas Balcazar who was a member of Guadalajara's legendary all conquering team in the 1940s and 1950s. He went to the World Cup with Mexico in 1954 in Switzerland.
Brothers Michael and Brian Laudrup were two of the more prominent members of the Danish national team from the 1980s through the late 1990s, although the former was famously not part of the country's heroic Euro '92 winning squad.
Their father, Finn Laudrup, had been a professional footballer with the national team as well. He played as a forward for a number of clubs in Denmark - his career even just overlapped with Michael's, but they were never quite team-mates.
Michael also has two sons that have become professional footballers - Mads and Andreas Laudrup, who are half brothers. Both have played for a number of clubs in Denmark, while Andreas has been a Danish champion with Nordsjaelland.
Uruguay legend Diego Forlan, Golden Ball winner at the 2010 World Cup, is the third generation of his family to play professional football after his father and grandfather made their mark before him.
Diego's father was Pablo Forlan, an international defender for Uruguay who went to World Cups in 1966 and 1974, and spent six years of his club career with Sao Paulo in Brazil after making his name at Montevideo giant Penarol.
Diego's maternal grandfather, Pablo's father-in-law, was also a footballer. His name was Juan Carlos Corazzo and he was a player for Independiente in Argentina in the 1930s, where Diego started out 60 years later, and also coached the Uruguayan national team to two Copa America titles and led the country to the 1962 World Cup.
1. Do Nascimento
Edson is the most famous member of the Do Nascimento family. You will probably better know this legendary striker by his nickname, though - Pele.
Pele shot to fame as as a 17-year-old at the 1958 World Cup when he helped a nation still mourning from losing out on home soil eight years earlier to its maiden title.
His father, Dondinho had also been a footballer, playing for Atletico Mineiro and the now defunct Bauru, the club where Pele initially started out before joining Santos. Pele's eldest son Edinho was a goalkeeper for several clubs, including Santos, in the 1990s, while another much younger son, Joshua, is in the junior ranks at Santos.
One of Pele's grandchildren, Octavio Felinto, the late Dondinho's great-grandson, was reported to have turned professional with little known Brazilian club Guarani in 2015.