Where does “Олжас” come from?

Олжас (Kazakh) comes from Kazakh жас, from Proto-Turkic yāĺ, from Turkish -mek, from Ottoman Turkish ـمك — to, infinitive-forming suffix.

Ancestry of “Олжас”, step by step

Олжас traces back through two separate lines of ancestry.

via Kazakh жас

StepLanguageWordMeaning
1Kazakhжасage
2Proto-Turkicyāĺage; year; young, fresh, green, raw, moist;...
3Turkish-mekInfinitive ending of verbs having a front or high...
4Ottoman Turkishـمكto, infinitive-forming suffix

via Kazakh ол

StepLanguageWordMeaning
1Kazakhолhe, she, it
2Proto-Turkicolthat; s/he
Every word from Ottoman Turkish ـمك →Every word from Turkish -mek →Every word from Proto-Turkic yāĺ →