When John Luke Hargadon was born on 10 June 1921, in Crockett, Contra Costa, California, United States, his father, Michael David Hargadon, was 36 and his mother, Katherine Mary Young, was 24. He married Shirley Wanda Vorhies on 11 November 1951. He lived in Judicial Township 12, Contra Costa, California, United States for about 10 years. He registered for military service in 1942. He died on 4 May 1999, in Big Bear Lake, San Bernardino, California, United States, at the age of 77.
Some characteristic forenames: Irish Liam.
Irish (Sligo): Anglicized form of Gaelic Ó hArgadáin ‘descendant of Argadán’, a personal name from a diminutive of argad ‘silver’. In Galway the traditional form O'Hargadan has tended to be replaced by Hardeman, and elsewhere in Ireland by Harman and Harmon .