The paternal grandmother's brother is considered the maternal uncle of the father and the sons

Q: My paternal grandmother has a brother. He is my father's maternal uncle and he is married. Is my grandmother's brother considered my grandfather or not? Is his wife (Part No. 17; Page No. 376) considered my grandmother or not? Does she have to wear the Hijab (veil) in my presence or not? Also my maternal grandmother has two brothers. They are my mother's uncles and they have wives. Are my grandmother's uncles considered my grandfathers or not? Are their two wives considered my grandmothers? Do they have to wear the Hijab in my presence or not? Are they considered non-Mahrams (not a spouse or an unmarriageable relative) to me or not? I hope your Eminence will reply to my request for a Fatwa (legal opinion issued by a qualified Muslim scholar). May Allah grant your Eminence success in doing what pleases Him; truly He is All-Hearing and Responsive. May Allah's peace, mercy and blessings be upon you.

A: The brother of your paternal grandmother is a maternal uncle to your father and to his children including you. His wife is a non-Mahram to you. The brother of your maternal grandmother is a maternal uncle to your mother and to her children including you. Their wives are non-Mahrams to you. May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.