Sir Arthur Osmond Wynn Williams JP DL was a Welsh Liberal Party politician. He became Constable of Harlech Castle, and Lord Lieutenant of Merionethshire.
- Occupation
- politician
- Position held
- member of the 28th Parliament of the United Kingdom, member of the 27th Parliament of the United Kingdom, Lord Lieutenant of Merionethshire
- Citizenship
- United Kingdom of Great Britain and Ireland
- Born
- March 17, 1849
- Died