Namesakes
Leszek I the White
(m) 1186-1227 
Polish High Dukes and Kings 1194-1198; 1199-1202; 1206-1210; 1211-1227
Leszek II the Black
(m) c. 1241-1288
Polish High Dukes and Kings 1279-1288
Leszek Miller
(m) 1946-
Polish Presidents and Prime Ministers 2001-2004 (prime minister)
Leszek Dunecki
(m) 1956-
Olympic Medalists 1980 4x100 m relay (silver)