þrjátíu

Etymology
From.

Numeral

 * 1) thirty; the cardinal number after tuttugu og níu and before þrjátíu og einn.
 * 2) * Genesis 5:3 (Icelandic, English)
 * Adam lifði hundrað og þrjátíu ár. Þá gat hann son í líking sinni, eftir sinni mynd, og nefndi hann Set.
 * When Adam had lived 130 years, he had a son in his own likeness, in his own image; and he named him Seth.