McGaffin
| Language(s) | Irish |
|---|---|
| Origin | |
| Meaning | Son of Eachán |
| Region of origin | Northern Ireland |
| Other names | |
| Variant form(s) | Eachán; Mac Eacháin; |
MacGaffin and McGaffin are Northern Irish surnames. They are Anglicisations of the Irish language Mac Eacháin, meaning "son of Eachán". The personal name Eachán is a diminutive of the personal name Eachaidh, which is based upon the Gaelic each, meaning "horse".