Killimett clan ancestry - Mullingar, Westmeath, Ireland

Records found indicate my that several of my ancestors lived and are buried in Mullingar, Ireland. Additional records indicate several Killiment families migrated to Argentina from Piercetown, Ireland. I am in the USA and have been attempting to compile my family tree. Killiment is my mother's maiden name. My great great Grandfather was John J. Killimett possibly but I'm unable to find actual birth and death date.

I have located one record of a John Killiment Born and buried in Mulligar 1797-1877. I have not had any success in tracing my USA born ancestor's lines any further past my Great Great Great Grandfather: Stephen W. Mills who was born in the USA (1828 - 1857). However, concerning these dates, he could be a relative of that Killimett family and my connection back to Ireland.

My roadblock in his instance is that records show that he was living in a government run "poorhouse/almhouse" when he was 20 years old. He married at around 22, had 2 children and died at 29 with no further records to his past.

I'm thinking he may be the "missing link" to obtaining ancentral history back to Ireland. Is there any assistance or advice available here from anyone that may be familiar with the Killimett clan in Ireland or where I may locate more informati

Kathleen Natoli