Willem de Mérode died in 1939.
Willem de Heusch died in 1692.
Willem de Keyser died in 1692.
Willem De Looper died in 2009.
Willem de Zwart died in 1931.
Willem de Poorter died in 1668.
Willem de Clercq died in 1844.
Willem Haultain de Zoete died in 1637.
Jan Willem de Jong died in 2000.
Jan Willem de Pous died in 1996.
Willem de Vries Lentsch died in 1980.
Willem Hendrik de Vriese died in 1862.
Willem de Vlamingh died in 1621and died of scurvy