Where does “Yamal” come from?

Yamal (Portuguese) comes from Icelandic jafnaldri, from Icelandic aldur, from Old Norse aldr, from Proto-Germanic aldrą, from Proto-Indo-European h₂él- — to grow, nourish.

Ancestry of “Yamal”, step by step

Yamal traces back through two separate lines of ancestry.

via Icelandic jafnaldri

Step	Language	Word	Meaning
1	Icelandic	jafnaldri	contemporary, person of the same age, age-mate
2	Icelandic	aldur	age
3	Old Norse	aldr	age
4	Proto-Germanic	aldrą	life; lifetime, age
5	Proto-Indo-European	h₂él-	to grow, nourish

via Russian Яма́л

Step	Language	Word	Meaning
1	Russian	Яма́л	Yamal (a large peninsula and a region in the Russian North)

Every word from Proto-Indo-European h₂él- →Every word from Proto-Germanic aldrą →Every word from Old Norse aldr →