I am searching for information on the Suastegui family. Jose Antonio Suastegui appeared in Teloloapan, Guerrero in 1727. He married Juana Velasquez (Belasques) whose family had been in that town for a good number of years. A second Joseph Suastegui turned up in Apaxtla, in about 1750, married to a Lucena. He may have been a younger brother, but was not the son of the first Joseph. I do not find sons who could have carried the name on, but it did abound in Guerrero by the mid-1800's.
If anyone shares an interest in these families, I would like very much to hear from you.