Namesakes
Fictional Characters from Television:
1 character
Danny "Mac" McGregor 2000 The District 
Notable Actors and Entertainers:
1 actor
Ewan McGregor 1971-
Notable Athletes:
1 martial arts
(martial arts) Conor McGregor 1988-
Olympic Medalists:
1 silver
(silver) Bob McGregor 1964 swimming - 100 m freestyle