Tiefenthaler is a German-language toponymic surname for someone originating from Tiefenthal. Notable people with the surname include:
Dominik Tiefenthaler (born 1971), Austrian-German actor Gustav Tiefenthaler (1886–1942), Swiss-American wrestler Jill Tiefenthaler (born 1965), American professor of economics and president of Colorado College Joseph Tiefenthaler (1710–1785), Austrian Jesuit missionary and geographer Paulo Tiefenthaler (born 1968), Swiss-Brazilian actor Verle Tiefenthaler (1937–2025), American Major League Baseball pitcher
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