Where does “Nulla” come from?

Nulla (German) comes from Italian nulla, from Latin nūlla, from Latin nūllus, from Proto-Italic oinos, from Proto-Indo-European óynos — one; single.

Ancestry of “Nulla”, step by step

Step	Language	Word	Meaning
1	Italian	nulla	feminine singular of nullo; nothing, anything;...
2	Latin	nūlla	no
3	Latin	nūllus	no one, none, not any, nothing
4	Proto-Italic	oinos	cardinal number 1 Previous: n/a Next: *duō;...
5	Proto-Indo-European	óynos	one; single