Unfortunately we know little about the Healy family. If Catherine was from Ballylongford, like her husband, she may have been connected to one or more of three households in Lislaughtin (Ballylongford) for whom 1911 census records were located. Details of each household, all of which were located in the townland of Ballyline West, are as follows:
Husband and wife Timothy (cannot read) and Mary (can read only) Healy, both aged 50, married 22 years, no children. Listed with them are two relatives (exact relationship not specified) named John (aged 18) and Johanna (14) Connor.
Ellen Healy, aged 65 and single (cannot read), living with servant.
Patrick Healy (38)
Mary (36), wife
Mary (12), daughter
Con (10), son
Ellie (9), daughter
John (5), son
Pat (2), son
Dan (5 months), son
Patrick and Mary were married 14 years and had seven children born alive, six of whom were still living.
Besides the children listed below, Catherine and her husband, Joseph, may have had another daughter named Jane as my grandmother ('Babe' Shanahan, a granddaughter of Catherine and Joseph's) had an 'aunt Jane' on her mother's side.
Healy is a very common surname throughout Ireland. For the most part, those bearing the Healy name today are descended from one of two Irish families, the Ó hEilidhe (from the Irish word "eilidhe" meaning "claimant") originally from south-east Sligo, and the Ó hEaladaighthe (from the Irish word "ealadhach" meaning "ingenious") from the parish of Donoghmore in Co. Cork. Given that Cork borders Kerry, I imagine Catherine may have been a descendant of the Donoghmore Healys.