I'm fairly certain I connect to Patrick through his granddaughter Agnes.
This may not be a great value add, but this is as much as I THINK I know (e.g., all third or fourth hand family legend).
-Family came from Westport Co., Mayo.Don't know if that means that is the place they embarked for the voyage or the closest big town to where they actually resided.
-Alleged to have some connection with O'Malley family.Don't know if that's for real or how far back.O'Malley's the Big Name in Westport, so probably not too helpful.I think every third person in that part of the world is named O'Malley.
-Know that Agnes regarded the spelling "Mulloy" as almost peculiar to their branch.I'm not sure that's so, or how far back that was true.Found them in 1860, 1870 censuses under "Maloy". "Mulloy" after that point.
-There's a Patrick Maloy family, b. 1797, living in nearby Richfield, Washington County in the 1850, 1860, 1870 censuses.Maybe they were related.My Mulloys lived in Menomonee, Waukesha, Co.
-Saw something about Patrick's wife, Mary nee Kelly.An online database had her funeral monument listing her birthplace as "Blarney Castle".Pretty sure this is a mistake--Blarney Castle is the name of a building, not a parish or townland.Maybe they mean just plain "Blarney".But my guess, based on another family legend, is that it is an error for "CastleblaKeney" in Co. Galway.That is O'Kelly country.
-I remember fractions of a goofy old story about the marriage of my great-grandparents, William Mulloy and Maggie Collins causing some sort of fracas.The Mulloys didn't think much of the Collinses, or something to that effect.Even if I recall the story accurately, I still have to question whether Agnes' understanding was 100% complete and accurate.But the story I had was that the Mulloys (and presumably his wife, Mary Kelly) were Connacht people, and had carried over an old world prejudice against Munster people.The Collinses were supposedly from Cork, though just where I don't know.
-Although William Mulloy and Maggie Collins were 2nd generation Americans, they retained use of the Irish language around the house.I realise that's not much of a clue as to where they came from, 'cause I think all of Mayo was still Irish speaking until the end of the Famine.But I thought it was interesting nonethless.