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| Laing | fairly rare: Antrim, N Connacht. Scottish, "tall man". |
| Lang | Quite numerous: Belfast, Galway, Sligo etc. Ir. Ó Lainn from Ó Flainn. However, the name is usually Scottish, associated with Clan Leslie. SI & SGG. |
| Layng | rare: Dublin, Cork etc. See Lang. |
Parishes where Laing and a second surname are both baptised.
This list shows total Laing Roman Catholic baptisms by county.
Click on the county to see detail.