Where does “duellera” come from?

duellera (Swedish) comes from Swedish era, from Latin āera, from Latin aes, from Proto-Italic aos, from Proto-Italic ajos, from Proto-Indo-European h₂éyos — a metal, copper, bronze.

duellera (Swedish): to duel

Definitions

to duel

Ancestry of “duellera”, step by step

duellera traces back through two separate lines of ancestry.

via Swedish era

Step	Language	Word	Meaning
1	Swedish	era	your, yours; you; era
2	Latin	āera	era or epoch from which time is measured
3	Latin	aes	money, pay, fee, fare; copper, bronze, brass;...
4	Proto-Italic	aos	bronze, copper
5	Proto-Italic	ajos	—
6	Proto-Indo-European	h₂éyos	a metal, copper, bronze

via Swedish duell

Step	Language	Word	Meaning
1	Swedish	duell	a duel
2	French	duel	dual; duel
3	Latin	duālis	dual
4	Latin	duō	two; 2
5	Proto-Italic	duō	two
6	Proto-Indo-European	dwóh₁	two

Every word from Proto-Indo-European h₂éyos →Every word from Proto-Italic ajos →Every word from Proto-Italic aos →