Where does “Servian” come from?

Servian derives from English Servia plus the Italian suffix -ana, which comes from Spanish -ana, itself from Latin -anus, ultimately traced to Proto-Italic -os.

Servian (English): Serbian; A Serbian

Definitions

Serbian; A Serbian

Ancestry of “Servian”, step by step

Servian traces back through two separate lines of ancestry.

via English ān

Step	Language	Word	Meaning
1	English	ān	—
2	Middle English	ān	a, an indefinite article
3	Old English	ān	lonely; entirely alone, solitary, single; one
4	Proto-West Germanic	ain	one
5	Proto-Germanic	ainaz	one; some
6	Proto-Indo-European	óynos	one; single

via English Servia

Step	Language	Word	Meaning
1	English	Servia	—
2	Greek	Σέρβια	—

Every word from Proto-Indo-European óynos →Every word from Proto-Germanic ainaz →Every word from Proto-West Germanic ain →