Rennert is a German surname, a variant of Renner, named after a profession or a nickname related to running, or a variant of Reinert, after a given name.Rennert, DFD Notable people with the surname include: Dutch Rennert (1930–2018), American baseball umpire Günther Rennert (1911–1978), German opera director and administrator Ira Rennert (born 1934), American businessman Peter Rennert (born 1958), American tennis player Wolfgang Rennert (1922–2012), German opera conductor
Other
Rennert, North Carolina, town in the US
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