Family name Mac Eoin (Mac Eoin 
) , in the entire world, is a very rare last name. The cognomen Mac Eoin is habitual in Northern Europe, particularly Ireland, where it is a rare surname.
| VARIANT | COUNTRY |
|---|---|
| Mac Eoin | Ireland |
|
seán mac eoin Irish politician and soldier (1893-1973), IE (b. 1893) |
|
| gearóid mac eoin Irish scholar, IE (b. 1929) |
|
|
| tomás mac eoin Irish singer, IE (b. 1937) |
|