Everyone is Irish on St. Patrick's Day, but here are three legends who you might not have figured being able to legitimately trace their family tree back to Ireland.

No. 3 Jason Kidd

Kidd has been a perennial NBA All-Star during his NBA career with the Mavericks, Suns and Nets, and won Olympic gold medals with Team USA in 2000 and 2008. He was born in San Francisco to an African American dad and an Irish American mom.

No. 2 Derek Jeter

The modern-day Yankee icon has won five World Series championships and seven American League pennants. In 2000, he was the MVP of the All-Star Game and the World Series. His mom is half Irish, half German. (His girlfriend, Minka Kelly, is also half Irish.)

No. 1 Muhammad Ali

The Greatest has Irish roots. According to Irish American Museum in Washington, "Abe Grady, his maternal great-grandfather, of Ennis, Co. Clare emigrated from Ireland and settled in Kentucky in the 1860s, he went on to marry a former slave. One of their grandchildren, Odessa Lee Grady Clay, gave birth to Ali -- then Cassius Clay -- in 1942 ... In 2009, the former heavyweight boxing champion visited Ennis - where he received a large "homecoming" from town residents - and met distant relatives."

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