|Gavan||rare: scattered. See Gavin.|
|Gavin||numerous: S Leinster, N Munster, Mayo. Ir. Ó Gábháin, Ó Gáibhín. There were septs in W Cork and Mayo. They are now in all provinces. This name is both first name and surname in Scotland.MIF & SGG.|
|MacGavin||Very rare: Dublin. Ir. Mac Gábháin, possibly gábhadh, want, need. See also Gavin. The name is in Scotland where it matches MacGowan, q.v.|
|Ó Gabháin||Gavin: líonmhar: deisceart Laighean, tuaisceart na Mumhann, Maigh Eo. Bhí clanna faoi leith in iarthar Chorcaí agus Maigh Eo. Fréamh: gábhadh, gátar, b'fhéidir.|
Parishes where Gaven and a second surname are found together
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