Georgeiii. George III (r. 1760-1820) George III was born on 4 June 1738 in London, the eldest son of Frederick, Prince of Wales, and Princess Augusta of Saxe-Gotha.
He became heir to the throne on the death of his father in 1751, succeeding his grandfather, George II, in 1760. He was the third Hanoverian monarch and the first one to be born in England and to use English as his first language. George III is widely remembered for two things: losing the American colonies and going mad. This is far from the whole truth. History Curriculum Homeschool.