Leabhar Mór Leacain / The Great Book of Lecan, written in 1397-1418 AD
This page is a tribute to my parents Michael and Johanna Wall Hennigan, who were both natives of County Cork and were both born in 1914.
Donnchadh O Corrain, 'Ireland before the Normans' (Dublin: Gill and Macmillan, 1972) noted that in the 10th century the Irish population was less than 500,000 people and Ireland had over 150 kings. These were petty kingdoms, or clans (tuatha), which typically elected the king. Also in the 10th century AD, a high king of Ireland (árd rí Éireann) emerged. In history, Brian Boru was apparently the most consequential high king, who reigned from 1005-1014 AD but the idea that Brian Boru saved Ireland from a Viking conquest is said to be “completely false.”
With respect to earlier times, even though the Gaelic language is Celtic in origin, the late Prof Barry Rafferty of University College Dublin said that from his research "there is no archaeological evidence for a Celtic invasion of Ireland."
While the term is useful, Raimund Karl, a professor of Celtic archaeology at the University of Vienna said, the “popular conception, that all Celts are the same, and that they are part of one big nation and people and race and so on, that is nonsense.”
The hereditary surname system evolved slowly replacing the patronymic tradition of a name typically derived from the name of a father or an ancestor. In Ireland Mac was 'son of' or Ó 'grandson of'.' Icelandic surnames today follow the Nordic tradition of patronymic and/or matronymic names.
Pronunciation, rather than spelling, guided scribes and church officials when recording names during the Middle Ages. This practice often resulted in one person's name being recorded under several different spellings.