I am looking for information a John Rea born in 1825 in Cavan,he was my great grandfather,the first records i have of him is when he married a Susan Curtis in 1877. on his marriage certificate he is down as a widower and his profession was a gentleman,his father was Robert Rea and his profession was a stonemason. they had three children,

Elisebeth Rea, born June 1878 (My grand mother)
John Rea Born July 1879
Annie Georgina Rea Born April 1882

On his marriage certificate and all the birth certificates the were living at 16 North Cumberland Street, Dublin

In my research i found a Robert Rea, Son of Edward Rea, married a Mary Ann Dixon in 1848, now he was 25 and she was 21, and had an address at Drumkeerin Black, Killeshandra, maybe he was a brother,
Can anyone help