Bigger, Biggar
Bigger, Biggar—In the district of Pointzpass, Co. Armagh, and in the adjoining border districts of Co. Down, some of the McGiverns (Mag Uidhirín) have assumed the name of Bigger, Bicker, and Bickerstaff, while in the districts of Downpatrick and those to the North they have assumed the name of Montgomery. The names Bigger and Biggar are derived from the placename of Biggar, in the County of Lanark, Scotland.
Alphabetical Index of Anglicised Surnames in Ireland
See also Woulfe’s Irish Names and Surnames
… and O'Hart's Irish Pedigrees