Domingo Amestoy (1822–1892) was a Basque sheepherder, and banker, one of the original founders to provide the financing for the Farmers and Merchants Bank in Los Angeles, California, in 1871.
On the night of April 2, the sheepherder Joe Allemand and four of his associates were encamped along Spring Creek, near the town of Ten Sleep, when a group of seven masked cattlemen attacked them.