It is spelled Caoimhín in the Irish language.
Caoimhín [roughly k(u)eeveen].
The Irish name Kevin is Caoimhín in Irish (Gaelic) and means 'beautiful birth, comely child'.
Caoimhín (modern spelling) or
Caoimhghín (older spelling), both are correct,
If the name occurs in an Irish language Bible that would be your best course.
As a last name Ó Ceallaigh.
Ó Ceallaigh is the surname O'Kelly or Kelly. It means descendant of Ceallach.
Caleb = Cálaeb
Cálaeb
The cast of Caleb Does Art - 2006 includes: Caleb Coppock as Caleb
Caleb Wilkerson's birth name is Caleb A Wilkerson.
Caleb
Caleb Roehrig's birth name is Michael Caleb Roehrig.
Caleb Knightley's birth name is Caleb Macdonald Knightley.
Caleb Eckstein's birth name is Caleb Joseph Eckstein.
Caleb Crusco's birth name is Caleb Alexander Crusco.
Ruth Caleb's birth name is Ruth Irene Caleb.
Caleb Thorne's birth name is Caleb Bill Thorne.
Caleb Pearson's birth name is Caleb Jordan Pearson.
Caleb Penrod's birth name is Caleb Ty Penrod.
Caleb Followill's birth name is Anthony Caleb Followill.