Where does “Айсұлу” come from?

Айсұлу (Kazakh) comes from Kazakh ай, from Proto-Turkic *āy — moon.

Ancestry of “Айсұлу”, step by step

Айсұлу traces back through two separate lines of ancestry.

via Kazakh ай

StepLanguageWordMeaning
1Kazakhайmoon; month
2Proto-Turkic*āymoon

via Kazakh сұлу

StepLanguageWordMeaning
1Kazakhсұлуbeautiful
Every word from Proto-Turkic *āyEvery word from Kazakh ай