Where does “dos” come from?

dos (Papiamentu) comes from Kabuverdianu dos, from Portuguese dois, from Portuguese dous, from Old Portuguese dous, from Latin duō, from Proto-Italic duō, from Proto-Indo-European dwóh₁ — two.

dos (Papiamentu): two

Definitions

Ancestry of “dos”, step by step

dos traces back through two separate lines of ancestry.

via Kabuverdianu dos

Step	Language	Word	Meaning
1	Kabuverdianu	dos	two
2	Portuguese	dois	two
3	Portuguese	dous	Obsolete form of dois
4	Old Portuguese	dous	—
5	Latin	duō	two; 2
6	Proto-Italic	duō	two
7	Proto-Indo-European	dwóh₁	two

via Spanish dos

Step	Language	Word	Meaning
1	Spanish	dos	two
2	Old Spanish	dos	two

Every word from Proto-Indo-European dwóh₁ →Every word from Proto-Italic duō →Every word from Latin duō →