Vriend was born in Andijk, North Holland, about 60 km north of Amsterdam, where she learned bridge as a student. There she also met her husband, Anton Maas, another international bridge player and sometime coach of the Dutch open team. Playing together they have won EBL championships in Mixed Teams and Mixed Pairs.
Vriend first played on the Dutch team in European Bridge League championships in 1974. For years including the 1994 World Women Pairs she played with Carla Arnold. From 1994 to 2003 including the 2000 Venice Cup championship her partner was Marijke van der Pas.
Vriend is a bridge teacher; she and Maas live in Amstelveen (2011 or later) – a suburb of Amsterdam.
- "International record for Bep Vriend". World Bridge Federation.
- Women Stars at the World Bridge Federation, with biographies (Vriend [ biography ] is no longer one of the listed stars)
- Profile (24 August 2000) at NRC Handelsblad (Dutch)
- Biography at Infobridge.it (Italian with crude English-language version)