Where does “Shivaism” come from?

Shivaism (English) comes from English ism, from English -ism, from Latin -ismus, from Ancient Greek -ισμός, from Ancient Greek -μός, from Proto-Indo-European -mós — Creates action/result nouns from verb stems.

Ancestry of “Shivaism”, step by step

Shivaism traces back through two separate lines of ancestry.

via English ism

StepLanguageWordMeaning
1EnglishismAn ideology, system of thought, or practice that...
2English-ismUsed to form nouns of action or process or result...
3Latin-ismus-ism
4Ancient Greek-ισμόςForms abstract nouns
5Ancient Greek-μόςForms abstract nouns
6Proto-Indo-European-mósCreates action/result nouns from verb stems

via English Shiva

StepLanguageWordMeaning
1EnglishShivaThe god of destruction and transformation, and together with Brahma and Vishnu, one of the principal deities in Hinduism. Within Shaivism he is viewed as the Supreme deity, whereas in other branches of Hinduism such as the Smarta tradition he is worshipped as one of the six manifestations of the Div
2Sanskritशिवauspicious, favourable; happy, fortunate; m...
3Sanskritशीto lie down
4Proto-Indo-Europeanḱey-to be lying down; to settle
Every word from Proto-Indo-European -mósEvery word from English -ismEvery word from English ism
Shivaism — Etymology, Origin & Word History | Etymology Explorer