Gerhard Oswald "Geert" Lotsij (13 January 1878 in Dordrecht – 29 June 1959 in Hilversum) was a Dutch rower who competed in the 1900 Summer Olympics.[1]
He was part of the Dutch boat Minerva Amsterdam, which won the silver medal in the coxed fours final B.
He is the older brother of Paul Lotsij.