Where does “Casar” come from?

Casar (English) comes from Spanish casar, from Spanish -ar, from Old Spanish -ar, from Latin -ō, from Proto-Indo-European -ō — Derives nouns from roots.

Ancestry of “Casar”, step by step

Casar traces back through two separate lines of ancestry.

via Spanish casar

StepLanguageWordMeaning
1Spanishcasarto marry, wed someone to; to marry off; to match...
2Spanish-arIn adjectives, indicating membership or status;...
3Old Spanish-arindicates membership or status
4Latinsuffixed to nouns or adjectives. Originally a-stem nouns. Later extended to nouns with other stems. Forms regular first-conjugation verbs
5Proto-Indo-EuropeanDerives nouns from roots

via German Cäsar

StepLanguageWordMeaning
1GermanCäsarRoman cognomen, especially referring to
2LatinCaesarJulius Caesar; emperor
3Latincaesariesor hair
4Proto-Indo-Europeankéysero-hair
Every word from Proto-Indo-European