This name became popular in Ireland because it was borne by Sinéad de Valera (1878 - 1975), the wife of the Irish president Éamon de Valera. She was born with the name Jane, but later chose to use its Irish form Sinéad.
― Anonymous User 12/4/2011
3
Not really a famous 'bearer', bit this is the name of a song by the Dutch band Within Temptation :)