SULLIVAN's of County KERRY

Hi all

Most of my gt gp's on Mother's side were Irish and ended up in New Zealand in the mid 1800's.

Some I can't trace back any further than where they came from.

One is my gt gm: Ellen SULLIVAN, born abt 1860 Co Kerry - her parents have been listed on a certificate as Donald SULLIVAN (Labourer in 1883) and Doby FLYNN.

There are some Sullivan/Flynn marriages etcon family search but there is no Donald or a Doby. There was a Daby, speltwith an 'a' but he was a man...has anyone heard of the name Daby or Doby for an Irish woman?

Sorry don't have parish or anything