There's a death of a William Gunn in Yarmouth 1864 , no ages were given till later on so cant tell if it's the correct one , but found this:
Marriages Dec 1865
Gunn Clara Yarmouth 4b 26 groom either Henry James Dew or Frederick James Hill
Private tree on Ancestry has A Clarinda Jemima (Clara) Davy born 1835 Suffolk