Frits Evert Eyken (30 June 1893 - 6 June 1978) was a Dutch rower who competed in the 1920 Summer Olympics.
Eyken was born in Jakarta, Indonesia. He rowed for Delft University, Laga, Netherlands. Eyken competed for Netherlands at the 1920 Summer Olympics in the single scull where he met Jack Beresford in the heats and lost by a margin.[1] In 1921, Eyken won the Diamond Challenge Sculls at Henley Royal Regatta beating Jack Beresford in the final.[2] Following Eyken's victory, Janus Ooms passed on to him the "Golden Belt" he was awarded in 1892. Eyken, in turn, passed it on to the next Dutch Diamonds winner Bertus Gunther in 1929[3]
Eyken died in Zwolle, Overijssel, Netherlands at the age of 84.