- Irish political leader: prime minister of the Republic of Ireland 1948–51, 1954–57.
- U.S. actor, half of the comedy team of Abbott and Costello.
- Elvis, real name Declan McManus. born 1954, British rock singer and songwriter. His recordings include This Year's Model (1978), "Oliver's Army" (1979), Spike (1989), Brutal Youth (1994), and When I Was Cruel (2003)
