 At the 1851 census, when Crathern was about 58 years old, he was a Professor of Music and was living at 4 Serampore Terrace, Hammersmith, with his wife Sarah and an unmarried daughter (Sarah Emma Crathern), aged 37, who was also a Teacher of Music, and one servant.There had also been a son, named Thomas Anthony Crathern after his grandfather, but he had died at the age of 28 on 5 November 1847 at the family home in Serampore Terrace.William Crathern's death was registered in the Kensington district in 1861.