Where does “Adán” come from?

Adán (Spanish) comes from Hebrew אָדָם, from Hebrew אדמה — earth, soil, land.

Ancestry of “Adán”, step by step

Step	Language	Word	Meaning
1	Hebrew	אָדָם	earth, man, soil, light brown; Adam; man, person
2	Hebrew	אדמה	earth, soil, land

Adán — Etymology, Origin & Word History | Etymology Explorer