Question: Robert Armstrong-Jones the Welsh physician was what relation to Antony Armstrong-Jones, 1st Earl of Snowdon?
Related documents: [0]  [DOC] Sir Robert Armstrong-Jones, CBE (born Robert Jones; 2 December 1857 – 31 January 1943) was a Welsh physician and psychiatrist. He was the grandfather of Antony Armstrong-Jones, 1st Earl of Snowdon (d. 2017). [END] 
[1]  [DOC] Antony Charles Robert Armstrong-Jones, 1st Earl of Snowdon, (7 March 1930 – 13 January 2017), commonly known as Lord Snowdon, was a British photographer and film maker. He was married to Princess Margaret, younger daughter of King George VI and the sister of Queen Elizabeth II. [END] 
Answer: 
the grandfather
the grandfather