Namesakes
Eurovision Song Contest Winners:
1 winner
Anni-Frid Lyngstad (a.k.a. Synni) 1974 Sweden 
Notable Musicians:
1 singer
Anni-Frid Lyngstad (a.k.a. Synni) 1945-
Rock and Roll Hall-of-Famers:
1 musician
Anni-Frid Lyngstad (a.k.a. Synni) 2010 ABBA