* For your father's brother: Mama (మామ)
* For your mother's brother: Mamaya (మామయ్య)
* For your father's sister's husband: Babai (బాబాయి)
* For your mother's sister's husband: Mamudu (మామూడు)
* For an older man in general: Aava (అవ్వ) or Peddana (పెద్దనా)
It's important to be mindful of the specific relationship to use the correct term.