@yetos:
Galati and Kelti are surely different and Gauls is proven to be different, so i doubt they could have common etymology; wilde etymologies are the cancer of paleolinguistic; the most reliable scholars are the most prudent! And even some well graduate scientists fall in the trap of hypothesis presented as undiscutable facts, helas.
All these are the same name of the same linguistic group.
Greeks call them Galates, belgae celts that moved to minor Asia (Brennos or vae victis story)
Herodotos names them Keltos
later Greeks call them Galloi,
their inner names Wallons Walles Wallach etc etc now this W in Greek turns to Γ K or B (C G V)
Aromani language which is celtic is called Armanesti,
VLACHISTI (maybe
wallachisti or villachisti?)
At the language of some Pontic Greeks we see the word
γαλαντζευω (
whala-) and means speak at own language/dialect
it can be coinsidence but the word for language and tongue in Greek Γλωττα Γλωσσα Γρουσσα, Γλωσσα try Γ-> wh or G and add an a, YOU GET Whalutta Whallussa or Galussa Galutta
the english word
YELL cognates with the ancient Greek word
ΚΕΛΕΥΩ ΚΕΛΛΩ, IE Kel-
at the lexicons we see synonyms are words
κελητας κελης κελευστης etc, means the one who is yelling orders, the yelling commander, (hero?)
in modern Greek is replaced by καλω
call
The birds in Greek are not singing, they
Κελ-αιδουν, they communicate and call each other
the ςατερ ατ waterfalls and streams do not make noise, they
Κελ-αριζουν, they speak
PS
There is another option, that Gaul means goat leather/fleece wearer, the ai-
Callicum, but I doupt
PS2
so yes I am not a linguist, and I have not conviced you
but since you are, can you explain the commonalities as concern the language?
cause I think you now have enough stable base to search,
Anyway I do not believe cancer in linguistics, but on the other hand I CAN NOT REJECT, using a scizzorcut, THAT CELT COMES FROM IE root KEL- means call speak command etc
from the same root that word Γλωσσα comes from, except if you prefer to lang- than to kel- (or it is kelan-guage?)
maybe I have not convice you, but I am certain that words Kelt Celt Gaul Whallon Whallach etc etc come from the same root of IE kel-