USS Tonkawa is a name used more than once by the U.S. Navy:
USS Tonkawa (ATA-176) was laid down as ATR-103 on 30 January 1944 at Orange, Texas.
Tonkawa (YTB-710,)a Hisada-class harbor tug, was slated to be built at San Pedro, California, by the Bethlehem Steel Co., but the contract for her construction was canceled on 1 October 1945.
USS Tonkawa (YTB-786), a Natick-class tugboat serving from 1966 to 2000.