Frederike Johanna Maria "Femke" Heemskerk (pronounced [freːdəˈrikə joːˈɦɑnaː maːˈrijaː ˈfɛmkə ˈɦeːmskɛr(ə)k]; born 21 September 1987) is a former Dutch competitive swimmer[2] who mainly specializes in freestyle, but also has a strong backstroke and medley.[3]
As part of the Dutch team, she holds the short course world record in the 4 × 50 m freestyle relay[4] and formerly the 4 × 100 m freestyle relay, and 4×200 m freestyle relay,[5] all set in Doha in 2014. Individually she has broken national records in six events, four in long course, 100 m and 200 m freestyle, 100 m backstroke, and 200 m individual medley, and two in short course, 200 m freestyle and 200 m individual medley. She represented Energy Standard in the International Swimming League.