Andrewartha

Cornish Names[1] says:

• Nouns:
  • "tre" a "town", feminine, maybe a hamlet or house
  • "tref: village, town", Brythonic Celt Welsh about 4-500 AD
• Adjectives:
  • "Wartha": "upper" (maybe higher or greater or on a hill)
    • cf. "Wollas": "lower" (maybe smaller or lesser or in a valley, of the two).
• Definite article:
  • "An" used as: "of the", "in the", "on the", "at the", in place names. Brythonic Celt Cornish language (Dexter, p. 18).

The book mentions "Trewartha" (p. 25), and "Andrewartha" (p. 60).

The Handbook of Cornish Names[2] states: "Trewartha" is a Cornish name meaning "Upper Farm" or "Upper Homestead".

• Herbert Andrewartha (1907–1992), Australian research scientist in the fields of entomology, biology, zoology and animal ecology
• Janet Andrewartha (born 1952), Australian actress
• John Andrewartha, Cornish-born American architect and civil engineer
• Roy Andrewartha, English snooker player, finalist at the 1977, 1978, 1979 & 1984 World Snooker Championships
• Jake Andrewartha, Australian Olympian judoka, 2014 Commonwealth Games Medalist and professional wrestler