Arsi Saarijarvi

(Finland) with a few minor editions and some editing by Yair Davidiy (Israel).

The Finnish name for God was Similar to that Employed by the Northern Hebrews about the name of God used by Finnish tribes.
Research indicates that the northern Hebrew from the Ten Tribes AVOIDED pronouncing the Name of God as it is written.
This was considered a commandment.

See:
Queries on the Holy Name
http://hebrewnations.com/articles/bible/name/queryhn.html
Holy Name?
http://hebrewnations.com/articles/bible/name/name.html
Name Hidden
http://hebrewnations.com/articles/bible/name/hidden2.html
History of the Name
http://hebrewnations.com/articles/bible/name/namehistory.html
Kyros (LORD)
http://hebrewnations.com/articles/bible/name/LORD.html

Exodus 20:3
You shall not take the name of the LORD your God in vain; for the LORD will not hold him guiltless that takes his name in vain.

The employment of a pseudonym by the Ten Tribes in place of the name of God was discussed in the article:
History of the Name
http://hebrewnations.com/articles/bible/name/namehistory.html#a3
#3. The Ten Tribes and the Holy Name. Simeon and Samaria

All the indications are that:
They referred to God as Yam instead of Yah.

This is similar to the Finnish Name for God.
The modern Finnish name for G'd is Jumala (Yumala).
Originally it was Yuma.
The root for Jumala (the modern usage) is Juma (Yuma) .
The postfix -la / lae means just place (belonging to the name of the root) or adjective (describes what kind of).
So actually all of the G'd names are Juma / Jumi / Joma / Jam / Jama (Yuma / Yumi / Yoma / Yam / Yama) where -la is added to describe a place name.

Similarly we have the names Kaleva and Kalevala . Kaleva (Caleb) is a man's name. Kalevala is the name of the village of the man inquestion. A work on Finnish folklore by Elias Lonnrot was given the title "Kalevala".
It was based on the songs, poems and folk wisdom the of Finns and Karelians [East Finns]. Nowadays the hero of the work is also referred to as "Kalevala" even though his proper name was Kalev.

Bjarmians ( Beormas / Perm / Perma / Permi / Komi / Syrians / Chuds / Tschuds / Veps / Ves / Savo / Carelia ) used the name Jomale / Yomale .

Norwegian Othar / Othere of Halogaland sailed to Bjarmland (which is Per ma [Komi] -> Pera maa [Finnish]-> Back land [English]) and robbed the (god) Jomale statue and lots of treasures from Finnic Permians. In the Island called Aland (Oland) there is village called Jomala (Yomala), which is close to Jomale.
The reason for that there is O is because of Scandinavian way of writing what they heard. Swedes use O letter in many places where they pronounce what Finns pronounce U. U is not pronounced like You in Finland but more like UU. So It may be that Permians did have Jumale instead of Jomale, but Norwegians wrote It as Jomale just like they themselves would have wrote it based on what they heard.

There are place names in Finland and Karelia such as Jama / Jaama (pronounced Yama / Yama) The origin of the word is unknown.
https://en.wikipedia.org/wiki/Kingisepp
Finns think that the name may be connected with the tribal name of Haeme (Hame), so that Haeme derives from Jaeaems (Yams).
https://fi.wikipedia.org/wiki/J%C3%A4%C3%A4mit / https://ru.wikipedia.org/wiki/%D0%95%D0%BC%D1%8C

Also there are placenames like Jaemsae (Yamsa) and Jamsankoski (Yamsankoski -> Yams' rapids). I was wondering whether It resembles Yam (sea), but an association with both G'd and the sea is also possible.
In Hebrew Yam means Sea. "Yam" was also the cognomen used by Northern Israelites to refer to the God of Israel.
https://en.wikipedia.org/wiki/J%C3%A4ms%C3%A4 / https://fi.wikipedia.org/wiki/J%C3%A4ms%C3%A4nkoski
Jamskij is a Russian family name but may original have indicated someone belonging to the Finnish tribe "Yams" against whom the early Russians in the region of Novgorod fought many battles.

In Latvia, there is a beach called Jurmala (Yurmala / Yrmala), which reminds Ymir and Ymar. Estonians and Livonians (inhabitatants Latvia) are culturally close to the Finns.

Also there are the terms Jumi and Jumo.
https://fi.wikipedia.org/wiki/Jumi

These words describe various spiritual and magical practices.
It is agreed however that etymology is probably the same as the word for God.

In this meaning It just means spirit in the world. Olla jumissa - means that you are stuck. It derives from Jumi wedding, when two are to be one and joined for each other.
Jumi has absolute presence and is also impossible to circle around or It can cause a sudden disease to an f.e. animal.