Captain John Gregory - Rep of Ireland Limerick

My grandfather John Gregory married Lucy Tyrell around 1904. There is some connection with Limerick and Arklow. He was a merchant seaman between Dublin and Bristol and the family eventually moved to Bristol. He was born in 1870 and died at sea in 1933. I believe he married the widow of a cousin, Lucy who had one child Kathleen at that time. He had 5 daughters with Lucy.
I am just researching the Irish links on my grandfather's background and parentage.