Meaning & origin
Where it comes from
O'Callaghan is a form of Callahan. Callahan comes from Irish.
Adapted from Wiktionary (CC BY-SA 4.0)
O'Callaghan’s family of names
In English usage, O'Callaghan as a surname has a related form in CALLAHAN.
The ring: nicknames and forms.
Hover or tab through the constellation to see how each name is related. Bigger dots are names more people in the U.S. share.
Nicknames & forms 1
Diminutives, pet forms, short forms and variants used alongside the name.
Similar names
If you love O'Callaghan, these share its style, era, origin or sound, from outside its own family.
O'Reagan
“of Riagán”
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O'Halleran
“descendant of Allmhurán”
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O'sullivan
O'Sullivan is a surname from Irish.
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O'Riordan
O'Riordan is a surname from Irish.
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O'Gorman
“descendant of Gormán”
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Ó Cathaláin
“strong in battle”
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Odhrán
“dun”
>99% boys
O'banion
O'Banion is a surname from Irish.
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