Let me give you the quick run down on the Landers name in Ireland. The name has its origins in the Norman-French "de Londres" or "of London." The family was granted land in Lincolnshire by William the Conqueror for their contribution at the Battle of Hastings. The family were also "Marcher Barons" on the Norman border with Wales and their seat was at Kidwelly Castle. See Geraldus. From Kidwelly Castle a younger son invaded Ireland with the Earl of Pembroke (Strongbow) in 1179 landing at Bannow Bay. His brother back in Wales was killed in battle but his sister, Matilda de Londres married Patrick de Chaworth and her great-grandchild became King of England. The Irish family was associated with Rosegarland Castle in Wexford. Archbishop Henry de Londres ruled Ireland for King John in the 13th century and began the building of Dubin Castle. He also quenched the"eternal fire" of St. Brigid believing it to be an unhelpful superstition. The family gradually moved to the South West of Ireland due both to expansion and a refusal to convert to Protestantism in the 17th century. The townland of Ballylanders on the Cork and Limerick border is associated with the family. Ancestry.com has very poor Irish records - best source for records is the Catholic Church in Ireland.