Pierre Geelhand de Merxem (1910 – 1982) was a Belgian tennis player of the 1930s and 1940s.

In 1946 he won through to the third round at Wimbledon, losing in four sets to Budge Patty.

He was beaten in the third round of the 1948 French Championships by 15th-seed Marcello del Bello in five sets.

He was non-playing captain of the Belgian sides which were Inter-Zonal finalists in 1953 and 1957.

[2] During the 1970s he served as Chairman of the Royal Belgian Tennis Federation.