No it is Scottish.
Gavin DeGraw's father is Irish, and his mother has a Russian/Jewish background. It has been reported that Gavin grew up in a Christian home.
The Irish Gaelic spelling is Gabhán.As a last name Ó Gábháin or Ó Gáibhín;also the very rare McGavin (Mac Gábháin) of the Dublin area.
It is the word for "friend" but the C is modified from the original "Caraid". "Standard" Irish uses "cara" but Scottish Gaelic and Galway Irish use "caraid".
"Gavin" is spelled G-A-V-I-N.
Ben Gavin's birth name is Benjamin Hogan Gavin.
Gavin Hetherington's birth name is Gavin Scott Hetherington.
Sounds an awful lot like Jack Lukeman, Irish singer likened to Morrissey, Gavin Friday, Van Morrison and others.
Gavin Scobie has written: 'Gavin Scobie'
Gavin Danker's birth name is Gavin Danker.
Gavin Salkeld's birth name is Gavin John Salkeld.
Gavin Rossdale's birth name is Gavin McGregor Rossdale.
Gavin Rapp's birth name is Gavin Thaddeus Rapp.