My Curran family

My family of Currans comes by Michael Curran. He was my great great grandfather. He was born (according to his headstone) in County Waterford in 1846. This is the only verified knowledge I have, no parish etc.

I found a family that immigrated in 1847 on a ship called the "Fidelia" with a father Patrick (25) mother Catherine (28) sons Thomas (4) Michael (3) and James (6 months). I also found an 1850 census for Yonkers NY (USA) for the same family, with one difference - Patrick is missing and they are living with a Wiliam Curran (who in 1850 is 50 yoa) Catherine was 33, Thomas was 7, Michael was 5, and James was 4. There was a daughter, Mary who was 9 months old at the time of the census..

These were the only Curran family I found with a Michael close to mine.

After this census, the family seems to have disappeared. I haven't found another record for them. All I do have is from Michael's line (wife and his daughter) on.

My Michael died young, again according to his headstone, April 12, 1869.

I know Michael lived in Yonkers, married Catherine Mansfield around 1868 and they had a daughter, Mary Teresa, born in 1870. She died in 1901. She and Catherine are both on the same headstone.

Since the headstone is wrong on Mary's death date, (according to her death certificate, she died in 1901 not 1912), I can't say for certain that Michael's is right, either for the birth or death. 

I know it isn't much, and I'm not sure it's even the same family for his parents and siblings - but it's all I've found.

A FB friend friend found a William Curreen (not Patrick), wife Catherine Tobin, married 3 Feb 1842, Aglish, Waterford and the same children baptisted in Ballycullane - Thomas (1843), Michael (1844), and James (1846), 

I'm not sure this is the right family, even with the similarities, because of the father's name being William not Patrick, and Micheal's birth being off by a couple of years (again, headstone could be wrong).

Any Curran's out there that have these people as family?