Last name Sinkwich (Sinkwich 
) , throughout the world, is a very rare cognomen. The last name Sinkwich is habitual in New Zealand, where it is a very rare surname, Canada, and the United States, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| Sinkwich | New Zealand, Canada, United States |
|
frank sinkwich All-American college football player, professional football player, halfback, quarterback, Heisman Trophy winner, College Football Hall of Fame, coach (1920-1990), US (b. 1920) |
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