Merckx is a Dutch patronymic surname, from the given name Merk / Merkus, a regional form of Mark / Marcus. While in Belgium the spelling Merckx is dominant, in the Netherlands the variants Merks, Merkus, Merkx, and Merx are more common. Notable people with the surname include: Merckx Axel Merckx (born 1972), Belgian racing cyclist, son of Eddy Merckx Eddy Merckx (born 1945), Belgian racing cyclist, widely seen as the most successful in history Eddy Merckx (billiards player) (born 1968), Belgian three-cushion billiards player Guillaume Merckx (born 1918), Belgian basketball player Jowan Merckx (born 1961), Belgian folk musician and recorder player Ken Merckx (born 1964), American television and voice actor (born 1944), Belgian PVDA politician (born 1951), Belgian politician and judge Merkus Hendrik Merkus de Kock (1779–1845), Dutch Navy general and nobleman Jeanne Merkus (1839–1897), Dutch social activist, philanthropist, and adventurer; daughter of Pieter Merkus Pieter Merkus (1787–1844), Dutch colonial administrator; Governor-General of the Dutch East Indies 1841–44 Named after him in 1845: Merkus pine (Pinus merkusii), a pine tree native to Sumatra Merkx Ryan Merkx (born 1992), Dutch basketball player Merx Adalbert Merx (1838–1909), German Protestant theologian and orientalist (born 1988), Dutch racing bicyclist See also Named after the cyclist Eddy Merckx: Eddy Merckx Cycles, a Belgian brand of high-end road bikes Eddy Merckx in the Vicinity of a Cup of Coffee, 1973 Danish experimental short film Eddy Merckx metro station, a Brussels metro station Grand Prix Eddy Merckx, a cycle race around Brussels Les Fabuleux Exploits d'Eddy Merckx, a biographical comic Merk (disambiguation) Merck (disambiguation) References Dutch-language surnames Patronymic surnames