Is your father or grandfather Robert Throckmorton who passed away Dec 1878 in Albuquerque, Bernalillo County, New Mexico?
If so, he was born in 12 Mar 1900.
He should be in the 1900 census, but I could not find him.
In the 1920 census there are three Robert Throckmortons born about 1920.
In the 1930 Census there are only two.
If you know the middle name, any of the wives names, any dates before 1930 that would be a huge start, and you would likely be able to connect to a massive family tre where most of the leg work has already been done.