Namesakes
Eurovision Song Contest Winners:
1 winner
Johnny Logan (a.k.a. Seán) 1980; 1987 Ireland 
Fictional Characters from Song Titles:
1 character
(character) Sean Flynn 1982 Sean Flynn
Fictional Characters from Television:
4 characters
Sean Blumberg 1998 Felicity
Sean DeLuca 1999 Roswell
Sean Hillinger 2001 24
Sean McNamara 2003 Nip/Tuck
Hurricanes and Tropical Storms:
2 storms
Storm Sean 2011
Storm Sean 2023
Irish Presidents and Prime Ministers:
1 president, 1 prime minister
(president) Seán T. O'Kelly 1945-1959
(prime minister) Seán Lemass 1959-1966
Nobel Prize Winners:
1 peace
(peace) Seán MacBride 1974
Notable Actors and Entertainers:
19 actors, 1 youtuber
Sean Connery 1930-2020
Seán McGinley 1956-
Sean Bean 1959-
Sean Young 1959-
Sean Penn 1960-
Sean Pertwee 1964-
Sean Patrick Flanery 1965-
Sean Harris 1966-
Sean Kanan 1966-
Sean Blakemore 1967-
Jason Donovan (middle name Sean) 1968-
Robert Sean Leonard 1969-
Sean Hayes 1970-
Sean Patrick Thomas 1970-
Sean Astin 1971-
Sean Maguire 1976-
Adrian Grenier (middle name Sean) 1976-
Sean Murray 1977-
Tyler Labine (middle name Sean) 1978-
Seán William "Jacksepticeye" McLoughlin 1990-
Notable Athletes:
4 rugby
(rugby) Sean Lamont 1981-
(rugby) Seán O'Brien 1987-
(rugby) Sean Maitland 1988-
(rugby) Sean McMahon 1994-
Notable Journalists:
1 commentator
(commentator) Sean Hannity 1961-
Notable Musicians:
5 singers
Johnny Logan (a.k.a. Seán) 1954-
Jason Donovan (middle name Sean) 1968-
Sean Combs 1969-
Sean Paul 1973-
Big Sean 1988-
Notable Writers:
1 author
Seán Ó Faoláin 1900-1991
Olympic Medalists:
1 bronze, 1 gold
(bronze) Tom McBreen (middle name Sean) 1972 swimming - 400 m freestyle
(gold) Sean Burroughs 2000 baseball
Oscar Award Winners:
2 actors
(actor) Sean Connery 1988 The Untouchables
(actor) Sean Penn 2004; 2009 Mystic River; Milk