Where does “Айболат” come from?

Айболат (Kazakh) comes from Kazakh болат, from Persian پولاد, from Middle Persian pwlʾpt'.

Ancestry of “Айболат”, step by step

Step	Language	Word	Meaning
1	Kazakh	болат	steel
2	Persian	پولاد	steel
3	Middle Persian	pwlʾpt'	—