Personally I think the likelihood of his surviving are unlikely.
He was an Author (and therefore one of the "intelligentsia") and married to a (much younger) Russian wife, educated at a boarding school in England. This is at the start of the Russian Revolution.
He probably wouldn't be able to leave the country if he wanted - his wife's roots seem to be there.
Would he have survived Stalin's purges of the 1930's ?
Much of this falls into the category "absence of evidence is not the same as evidence of absence" .
At least we now have a fuller name and a better understanding of why someone who thought of himself as Persian would be translating Gorky's work from Russian into English.
By the way :
https://archive.org/details/adventuresofduns00dunsrich covers some of the events in Persia/Iran towards the end of WW1 and the Russian involvement during the Russian Revolution.
BobC