"Rais" is Arabic (Means Leader, Chief)
"Riaz" is also Arabic (Means Meadow, Garden)
"Raiz" is not a Jewish name.
Raiz was born on April 22, 1967, in Naples, Campania, Italy.
Raiz forte is a Portuguese equivalent of 'horseradish' [Armoracia rustica].
Carmela Raiz is a fictional author and doesn't exist in real life.
the root
The cast of Raiz - 2013 includes: Eugenio Morales Mercedes Mujica Elsa Poblete Celia Uribe
Raiz - 2013 was released on: Chile: 2013 USA: 8 January 2014 (Palm Springs International Film Festival)
raiz (rahYEETH) (TH as in 'thin')
The cast of Raiz Quadrada de 48 - 2011 includes: Leandro Cabral Ana Guiomar Joana Santos
It can be a Jewish name, but as in most Jewish surnames, it can also be a non-Jewish name.
Goldston can be a Jewish name, but is not always a Jewish name.
Although it is not a Jewish surname in its origin, any name can be a Jewish name if it is the name of a Jewish person
"Feijão de Raiz" is the name of a Brazilian culture festival.It celebrates many arts such as samba, the root ("raiz") of Brazilian music, and also great food, such as feijoada, the national dish of Brazil, made of beans ("feijão").So the expression "bean of the root" does not really mean anything by itself, it's just a funny assembly of words.The festival seems to be a unique event that happened in May 2011.I can't see any reference to it for 2012.Moving to Portuguese language category.