Jiron is also spelled Giron and Xiron.You can find information by going to the Hispanic Genealogical Research Center website and running the name.Dimas Jiron (born around 1686) died in 1738 and his decendants began keeping both his first and last name as the surname. After about two generations, some families began using only Dimas, others kept Jiron. See Fray Angelico's book the Origins of New Mexico.Many of the baptismals are in the Santa Fe churchSt. Francis of Asisi (especially from about 1805 thru 1850+). You can also e-mail me.