Fontaine Maury Maverick Jr. was an American lawyer, politician, activist, and columnist from the U.S. state of Texas. A member of the prominent Maverick family, he was the great-grandson of Samuel Maverick, the rancher who signed the Texas Declaration of Independence and famously refused to brand his cattle, and the son of Maury Maverick Sr., a two-term member of the United States House of Representatives.

Fontaine Maury Maverick Sr. was a Democratic member of the United States House of Representatives from Texas, representing the 20th district from January 3, 1935, to January 3, 1939. He is best remembered for his independence from the party and for coining the term "gobbledygook" for obscure and euphemistic bureaucratic language.