""" His maternal ancestors were settlers who lived in Texas, and over the generations acquired a 25,000-acre (101 km2 or 39 miles2) ranch near Cotulla. As of March 2015, Bezos was among the largest landholders in Texas. Bezos’s maternal grandfather was a regional director of the U.S. Atomic Energy Commission in Albuquerque. """ From Bezos wikipedia entry[0].

Hardly what i would call first generation rich... The foundation for his wealth (his education, social status etc) could - his ancestors being texan settlers and all - very well be based on very much violence (theft of land from native americans etc.)

[0]https://en.wikipedia.org/wiki/Jeff_Bezos