Where does “nhất là” come from?

nhất là (Vietnamese) comes from Vietnamese là, from English lä, from French là, from Italian là, from Spanish la, from Portuguese lá, from German a, from German a-Moll.

nhất là (Vietnamese): Used to emphasize one's following statement over the others: especially; most importantly

Definitions

Used to emphasize one's following statement over the others: especially; most importantly

Ancestry of “nhất là”, step by step

nhất là traces back through two separate lines of ancestry.

via Vietnamese là

Step	Language	Word	Meaning
1	Vietnamese	là	fine silk; to be; to iron
2	English	lä	Sixth tone of the diatonic scale
3	French	là	there; here, present
4	Italian	là	there
5	Spanish	la	feminine singular definite article; the
6	Portuguese	lá	there; used with an adverb phrase to indicate...
7	German	a	Alternative form of A; Abbreviation of a-Moll;...
8	German	a-Moll	A-minor
9	Hungarian	a	the; this; that
10	French	à	to; on the, to; at
11	Middle French	a	to; towards; third-person singular present...
12	Old French	a	to; towards; belonging to
13	Latin	A	—
14	Etruscan	𐌀	and, also
15	Ancient Greek	ᾱ̔	—
16	Phoenician	𐤀	ox; aleph; alef
17	Egyptian	𓃾	—

via Vietnamese nhất

Step	Language	Word	Meaning
1	Vietnamese	nhất	first; the most in..; at the top of one's...
2	Middle Chinese	一	—

Every word from Egyptian 𓃾 →Every word from Phoenician 𐤀 →Every word from Ancient Greek ᾱ̔ →