Clifford Jones

Clifford (or Cliff) Jones was a part of the Wholeweal community in Llanfairfach, Wales. He fell in love with and got married to Jo Grant.

Biography
Cliff was a brilliant Welsh scientist living at Wholeweal who studied fungi. He was especially interested in their overlooked nutritional value and as a means to solve the problem of world hunger. Like the rest of the Wholeweal community, he opposed Global Chemicals and protested against them at a public announcement by their director, Stevens. He first encountered Jo Grant in his laboratory, just as she accidentally ruined one of his experiments. Although gruff to her at first, Cliff gradually fell in love with Jo. By the time Global Chemicals had been defeated, he asked her to marry him, to which she agreed, having already pulled some strings with her influential uncle to have Wholeweal provided with UN funding. (DW: The Green Death)

The two honeymooned in the Amazon while looking for obscure fungi. (DW: Planet of the Spiders)

They had seven children and thirteen grandchildren by 2010. While Jo attended what she thought was the Doctor's funeral, Cliff was picketing an oil rig in the Ascension Islands. (SJA: Death of the Doctor)

The Eighth Doctor Adventures novel Genocide mentions they had a son together but by the 1990s they had been divorced. This contradicts the statements by Jo in Death of the Doctor.