Tiermes is a Sami

Sami people

The Sami people, also spelled Sámi, or Saami, are the arctic indigenous people inhabiting Sápmi, which today encompasses parts of far northern Sweden, Norway, Finland, the Kola Peninsula of Russia, and the border area between south and middle Sweden and Norway. The Sámi are Europe’s northernmost...

 god of thunder

Thunder

Thunder is the sound made by lightning. Depending on the nature of the lightning and distance of the listener, thunder can range from a sharp, loud crack to a long, low rumble . The sudden increase in pressure and temperature from lightning produces rapid expansion of the air surrounding and within...

 and rain, also called Aijeke or Ajeke and often identified with Horagalles

Horagalles

In Sami shamanism, Horagalles, also written Hora Galles and Thora Galles and often equated with Tiermes or Aijeke , is the thunder god. He is depicted as a wooden figure with a nail in the head, and with a hammer or occasionally on shaman drums, two hammers...

.

Tiermes is god of the sky and thunder and lightning, the rainbow, weather, oceans, and lakes and rules over human life, health, and well-being. He protects people and their animals from "hurtful demons" and "evil spirits" (i.e., trolls). According to the mid-18th century Cérémonies et coutumes religieuses de tous les peuples du monde, "Thiermes or Thoron" is the first in a trinity, of whom the other members are Storjunkare and Baivre or Jumala. He is also called Aijeke, "grandfather" or "great-grandfather"; in 1673 Johannes Scheffer wrote that when Aijeke thundered, he was called Tiermes.

The names of the god vary considerably between regions, with Tiermes and variants being commonly used among northern Sami and Horagalles and variants among southern Sami, but unlike Horagalles, the name Tiermes is not a loanword

Loanword

A loanword is a word borrowed from a donor language and incorporated into a recipient language. By contrast, a calque or loan translation is a related concept where the meaning or idiom is borrowed rather than the lexical item itself. The word loanword is itself a calque of the German Lehnwort,...

; it is related to Torym, found in Siberia.