Table showing surnames in Ireland having 5 entries and upwards in birth indexes of 1890...etc.
*McParland (24) - "McParland," Armagh--
"McPartlan" (12)and "McPartlin," (11)
Leitrim.
- from A Genealogical History of the Milesian Families of Ireland by Heraldic Artists Limited, Dublin, 1968, page 153.
Hi: The above McPartlan is not exactly McPartan, but this may help. The book says that the "figure in brackets ...indicates the number who so spelled the name while the asterisk denotes there were also other variations of the name."