Actually, Yaya is more or an informal name for grandmother (such as "granny"). More "fomal" words include "ProMETer" and "ProMAMme".
As far as links between Greek and Hebrew are concerned, little has been written. For ages, I am trying to find the out-of-print book *Hebrew is Greek* by
Joseph Yahuda (Becket Publications of Oxford, England 1982) which traces the linguistic affinities between the two languages and suggests that Hebrew has been heavily influenced by Greek.