Samuel Santiago VAN WAGNER (b. approx. 1875 in NM) was the son of Charles VAN WAGNER (b. approx. 1837 in NY - probably an ex-Union soldier at Ft. Craig near Socorro NM) and Manuela Barelas of NM.
Samuel VW was a Presbyterian minister in NM, and later AZ and Calif. - he attended the Presbyterina Theol. College of the Southwest, Del Norte CO some time prior to 1900. He married Rebeca Chavez (of my extended family). Two of their children married married my (Chavez) aunt and uncle. Another Van Wagner child married the son of another Presbyterian minister, Jose Celestino Rodriguez.
Samuel VW died in 1971 in the San Diego CA area where he and his wife resided late in life.
The surname Van Wagner, shows up in various ways: Wagner, Waggoner, Van Wagoner, Van Wagenen, etc.
I'd be interested in hearing more about your surname, as I suspect that it has the same origin.