Where does “墨西哥” come from?

墨西哥 (Japanese) comes from English Mexico, from Spanish México, from Classical Nahuatl Mēxihco — Mexico.

Ancestry of “墨西哥”, step by step

Step	Language	Word	Meaning
1	English	Mexico	—
2	Spanish	México	Mexico
3	Classical Nahuatl	Mēxihco	Mexico

墨西哥 — Etymology, Origin & Word History | Etymology Explorer