Searching for ancestry of Peter Edward McKenna, Sr. of Nova Scotia (?), who married Isabella Latta of Londonderry, Ireland in Philadelphia, Pa. ca. 1850. Their children during their marriage in Galveston, Tx. were Peter Edward McKenna, Jr. and Rudolph Hamilton McKenna.Peter, Sr. was a printer by trade in Galveston. Son Rudolph died in the 1918 flu epidemic. Appreciate any help.