Namesakes
Characters in Celtic Mythology:
1 character
Fergus Fortamail (m) 
Irish Kings:
3 kings
King Fergus Fortamail 274-262 BC
King Fergus Dubdétach 203-204
King Forggus (a.k.a. Fergus) 565-566
Notable Athletes:
1 rugby
(rugby) Sean Lamont (a.k.a. Fergus) 1981-
Olympic Medalists:
1 bronze
(bronze) Fergus Kavanagh 2008; 2012 field hockey
Saints:
1 saint
Saint Fergus of Scotland ?-721
Scottish Kings and Queens:
2 kings
King Fergus Mor c. 500-c. 501
King Fergus mac Eochaid 778-781