Columba is pretty interesting, but I think I prefer some of the other names. From Wikipedia:
Saint
Columba (7 December 521 – 9
June 597
AD) – also known as
Colum Cille (Old Irish, meaning "dove of the church"),
Colm Cille (Irish),
Calum Cille (Scottish Gaelic) and Kolban or Kolbjørn
Warren I find dowdy and plain.