No. 16 Oâ€™Connor Heirs
By the time of his death in 1887, Irish immigrant Thomas Oâ€™Connor (1817â€“1887) owned half a million acres in Southeast Texas and close to 100,000 head of cattle. His philosophy? â€œBuy land and never sell. Land canâ€™t die, and it canâ€™t run away.â€ Son D.M. Oâ€™Connor (1839â€“1900) discovered oil while drilling for water, further solidifying the family fortune. Descendants oversee operations at Oâ€™CONNOR RANCH, which stretches across Goliad, Refugio, and Victoria counties.