Kelleher/Callaghan, Sullivan/White = James and Mary

Trying to gather info on my great-grandfather and great-grandmother. His name was James Francis Kelleher; parents were Cornelius Kelleher and Hanora(h) Callaghan. He was born July 25, 1875 in Ireland but I don't know where. On one child's birth certificate he indicates he was from Cork but that may only have been his place of departure. On Feb. 1, 1909 he married Mary A. Sullivan (born in Boston 1886 or 1887); her parents were Timothy Sullivan and Hanora White, also born in Ireland. 

James and Mary Kelleher lived in Massachusetts and had, from 1910 to 1930, 12 children: James, Mary Hanora, Cornelius, John Joseph, Margaret, Alice, Helen Rita (my grandma), Paul R., Leo, Thomas W., Francis, and Virginia (who died in infancy). Also included in the 1930 census, whence all this information was confirmed for me, was listed a James Mahoney, age 28, relation: cousin. No idea which GG he was a cousin of.

Researching Massachusetts records is a bit of a trying process. I know that eventually I'll have to open  my billfold but I hope to get as far as possible prior to giving the gov't more money.  :) Do any of these folks ring any distant bells over there? I'd appreciate any help, ideas, pointers, or even a good joke. Thank you to all who read!