Namesakes
Characters in Celtic Mythology:
1 character
Finn (m) 
Fictional Characters from Television:
4 characters, 1 hero
Julie "Finn" Finlay (a.k.a. Finn) 2000 CSI: Crime Scene Investigation
Finn Abernathy 2005 Bones
Finn Hudson 2009 Glee
Finn Polmar 2009 The Good Wife
Finn Mertens 2010 Adventure Time
Irish Kings:
1 king
King Finn 725-705 BC
Nobel Prize Winners:
1 economics
(economics) Finn E. Kydland 2004
Notable Actors and Entertainers:
4 actors
Finn Wittrock 1984-
Finn Jones 1988-
Toby Regbo (middle name Finn) 1991-
Finn Wolfhard 2002-
Notable Athletes:
1 rugby, 1 wrestling
(wrestling) Finn Bálor 1981-
(rugby) Finn Russell 1992-
Olympic Medalists:
1 bronze
(bronze) Finn Tugwell 2004 table tennis