Latin for God is Deus. The genitive form is Dei, meaning of God or God's.
Lamb of God isn't a latin phrase.
Dei is a Latin word for god.
Deus
Deus is the Latin equivalent of "God."Specifically, the Latin word is a masculine gender noun. The form is in the singular. The pronunciation is "DEH-oos."
The word is originally from the Latin word deus. This is the word for god in Latin. Deists are people who believe there is a higher power, but it is not necessarily the Christian god.
God of water: deus aquae Water of god: aqua dei
Dei Verbum
Dei - of God.
Mercury is a latin word-it was the name for the roman god of messages, travel, thieves and luck (greek god Hermes). The planet Mercury was named after the god. If you are asking for the metal mercury, it would have come from the god's name, and it is unlikely that the romans had a specific word for that metal.
There isn't one. But the word "Volcano" is derived from Latin word "Vulcanus" later "Vulcan" which is a name of Roman god of fire.
The word "theo" is not Latin but Greek - classical Greek Θεός (theos) means deity or god.