Bernard and Bridget (Twins) were born in Tully - see www.irishgenealogy.ie - Page 43 - 1866 - entries 21 and 22 in the Civil record. The confusion arises when the civil registration district does not correspond with the home address. Tully townland in County Leitrim is in the Barony of Carrigallen and in the Civil parish of Outeragh, Poor Law Union of Bawnboy.
Church records show baptism in Outeragh on November 12th 1866.
The only other family member, apart from Peter, Junior was Margaret - Baptism: December 1st 1854.
Marrriage record for parents not found.
Civil Registration began in Ireland from January 1st 1864