You should find Gyritha living at Vendersgade 11 in 1916,1921, and 1925. (sorry, I didn't write down the opslag #s)
Gyrtiha died 2 Jan 1927 (Skt Andreas Sogn)

I had thought that their probate records might be of help - those that I've found on my own family listed all the children - but I'm not familiar enough with Københavnske skiftearkivalier to find (or translate) the actual records.
I did find August Hammer on opslag 161 in 'Københavns byret, skifteretten fra 1919 Navneregister: Hovedregister 1921'

And Gyritha on opslag 143 in 'Københavns byret, skifteretten fra 1919 Navneregister: Hovedregister 1927

J Murphy