spacemonkey
The Hood website seems to work on the basis of people informing them whether relatives were crew. They also require some sort of proof. You don't need to submit it to them but just tell them what it is and they will add if it all stacks up.
My Grandfather was a PO II on the Hood. He was Admiral Walter Cowan's coxswain; they were apparently good friends…. in a sort of patrician to plebeian sort of way. He was my father's godfather. I have bundles of letters from him (Cowan), the HMS Hood crossing the line certificate from the world cruise in 1929 along with mentions in despatches from when he was on Electra where he had risen to the giddy heights of CPO. He was offered a commission in 1940/41 but refused it. He was a career navy man and as he had been there since he was a boy (taking a small part in the battle of Jutland in WW1) he felt his place was below decks rather than as an officer where he would be remote from the guys he felt were part of his "family".
Sadly, he didn't survive the war so I never met him. He dies when Electra went down in the Battle of Java Sea in 1942 (I think), about this time of year (28th Feb).
War sucks doesn't it?