Michael Ayrton was born Michael Gould but used his mothers maiden name professionally.
Ayrton was an English artist and writer, renowned as a painter, printmaker, sculptor and designer, and also as a critic, broadcaster and novelist.
Sources
England & Wales General Register Office, GRO Online Index - Birth (https://www.gro.gov.uk/gro/content/ : accessed 12 January 2022) database entry for Gould, Michael Ayrton. (Mother's maiden name: Ayrton) GRO Reference: Q1 1921 in St. Pancras, Volume 01B, Page 46.
"England & Wales, National Probate Calendar (Index of Wills and Administrations), 1858-1995". Ancestry Sharing Link - Ancestry Record 1904 #21075894 (accessed 2 February 2022). Michael Ayrton probate on 19 Feb 1976 in London. Died 17 Nov 1975 in Halstead Essex.