Glynn County is named for John Glynn.
John Glynn of Glynn (1722-1779) was an English lawyer and Member of Parliament. Glynn was born to an ancient family of Cornish gentry. He inherited his father's estate in Glynn, Cornwall upon the deaths of his elder brother and his nephew.
Glynn was admitted to the Middle Temple on January 21, 1740-41. On January 28, 1747-48, he was called to the Bar. In 1763, Glynn became Sargeant-at-Law, and in the following year Recorder of Exeter. Known for his skill as a pleader, Glynn was engaged in many celebrated cases. Elected to Parliament for Middlesex in 1768, Glynn served in Parliament until his death. In 1772, he was elected Recorder of London. Glynn's speeches in Parliament were highly praised. Glynn County, Georgia was named after John Glynn in recognition for his support for the cause of American independence in Parliament.