After my Uncles death in 1951, my Aunt Ariadne Ladenis re-married I assume somebody with the surname Economou. (her name is now "Ariadne Economou").
Before my uncle died, I believe they had at least two (maybe 3) sons together.
Although the mother Ariadne maybe dead the boys are 60-65 years old and I believe both live in England (mother visited Plymouth). All my searches failed because I do not know their first name. Their second name could be their real fathers name Tzamburakis or the stepfathers name Economou.
All were born either in Nairobi, Kenya or in Tanga, Tanganyika.
It is extremely unlikely that they will read this, However, I hope someone with knowledge of their past my read it and do something about it.
Possible names: Stellios, Nikos and George.