Austen had a large family. She had six brothers—James (1765–1819), George (1766–1838), Edward (1767–1852), Henry Thomas (1771–1850), Francis William (Frank) (1774–1865), Charles John (1779–1852)—and one sister, Cassandra Elizabeth (1773–1845), who died without marrying. Jane deeply loved Cassandra, and they were both best friends. Of her brothers, Austen was most close to Henry, who helped spread and influence her writing. "Oh, what a Henry!" she once wrote. George was almost ten years older than Jane. He suffered from fits and was not able to develop normally. His father wrote of him, "We have this comfort, he cannot be a bad or a wicked child". He may also have been deaf and mute. Jane knew sign language (she mentioned talking "with my fingers" in a letter) and could have communicated with him. Charles and Frank served in the navy. Edward was adopted by his fourth cousin, Thomas Knight. He became "Edward Knight" instead of Edward Austen in 1812.