Rear Admiral John Geraerdt Crommelin Jr. (2 October 1902 – 2 November 1996) was a prominent American naval officer and later a frequent political candidate who championed white supremacy.

[1] In 1949, he was transferred to Navy headquarters in The Pentagon at the rank of captain during the period of time of military budget reductions and unification of the command of the services.

[2] Although he was widely praised and credited for his courage in speaking out for his views and for his previous distinguished combat career, Crommelin's reputation suffered from his later political involvement.

While Crommerlin lost the primary by a 2-to-1 margin, Grant himself was routed in the general election in a backlash to the federal Democrats passing the Civil Rights Act of 1964.

USS Crommelin, commissioned in 1983 as the twenty-eighth ship of the Oliver Hazard Perry class of guided-missile frigates, is named for John G. and his four brothers.

The brothers are the only group of five siblings to graduate from the US Naval Academy, further highlighted by all five serving combat duty in World War II.