I can't really find anything in the public domain for Danny's son, Dominic Daniel Kirwan, who would be 52 now.
I'm not sure I've seen this comment before from Jeremy following Danny's death
“It’s hard to say what caused Danny’s later problems,” considers Spencer. “Some blame the drugs and the alcohol, which in some ways enhances inherent psychological problems, and him being a ‘sensitive musician’ to boot. He was jittery and nervous, and the pressure became too much for him. He once said in a rare interview from the 90s something along the lines of playing the black people’s music requiring too much of you, and he regretted touching it. In some ways, I agree; when truly playing blues, you need a balance of positive energy, if you like, to counteract the possibility of being swallowed up in the ‘Green Manalishi’ of deep, dark depression.
“We lost regular contact after I left the band in 1971,” Spencer continues. “Although we did meet for coffee in London, 1978, and did not meet again until the early 2000s, when my wife and I met him, his ex-wife Clare and their son Dominic for lunch in London. It was pleasant enough, even though he was in his own world.”
The same article speaks of him being kept going by royalty cheques in a basement Brixton flat.
https://www.musicradar.com/news/then...t-danny-kirwan
When I lived in London I often imagined bumping into Danny somewhere or other; I hope I would have had the good sense to let him be. I think he was in a homeless hostel in Covent Garden for a long period; those royalty cheques can't have amounted to that much.