88%RatingSave Gender Masculine Usage English Pronounced Pron. WAHT-sən [key·IPA] Meaning & HistoryExpand Links From an English surname meaning "son of Wat". A famous fictional bearer of the surname was Dr. Watson, the assistant to Sherlock Holmes in Arthur Conan Doyle's mystery stories beginning in 1887. PopularityDetails Last ranked #593 in 2021 United States Categories ends in -son, surnames, The Kindaichi Case Files characters