Brennan
Number of Entries in Birth Indexes for 1890
*Brennan (336)
Ireland
358
Leinster
178
Munster
50
Ulster
36
Connaught
94
Counties in which principally found
Kilkenny, Dublin, Sligo, Mayo, Carlow, and Roscommon.
For an explanation of the above table see Table Explanation.
To find spelling variations and alternatives to particular surnames, see Matheson’s Varieties and Synonymes of Surnames and Christian Names in Ireland.