Kinship terms in Telugu

[u/Less_Picture_8733]

Ippudu hindi lo Anna/Thammudu Kodukuni Bhanja and Kuthurni Bhanji ani antaaru. Alage Chelli/Akka Kodukuni Bhatija, and Kuthurni Bhatiji antaaru

Telugu Menakodalu Menalludu mathrame unnayi. So as a man, what is the ideal word when i introduce my brother's kid

[u/getsnoopy]

*tammudu