Hello
I found the church marriage record for Ellen Keily and it looks like her father is listed as Jerry in the record. It could be Gene but the last letter looks like a Y. (attached)
I found a birth record for Ellen Kiely, March 6, 1846. Father is listed as Owen (a variant of Eugene) and mother is listed Mary (or Marg). Sponsors are Ellen Kiely & Michael Crowley. (attached)
If you look at the marriage certificate you have you will see her witness was Jeremiah Keily. I found a birth record for Jerry Kiely, March 6, 1841. Father is listed as Owen (a variant of Eugene) and mother is listed Margt. Sponsors are Mick Kiely & Margt Crowley. (attached)
All records can be found here under Blarney Parish. I'm sure you will find other family members and records if you scroll through the pages.
https://registers.nli.ie/parishes/0020Good Luck!
Mary