Mirza Aziz Ahmad, was the eldest grandson of MGA. His photo can be found here: http://www.ahmadiyyagallery.org/Personalities/Companions-of-The-Promised-Messiah/i-NnN2fSd/A
He seems to have taken bait with MGA in 1906, however, the reason is not given, he lived right next door to MGA and his family and must have known them very well, his father, Mirza Sultan Ahmad was never home in Qadian, he was always working and thus on the road. It is also unclear whether Mirza Sultan Ahmad had any other children, his wife’s status is also unknown. Further, Mirza Aziz Ahmad was never heard from ever again in any Ahmadiyya history. I have found un-verified sources that claim that his mother was Sharifa Begum and his daughter was Naseera Begum. https://www.geni.com/people/Hazrat-Mirza-Aziz-Ahmad/314417855120008459
” In a dream that I saw on October 20, 1899, I saw a boy whose name was ‘Aziz and his father’s name began with Sultan. That boy was brought before me and was seated before me. I noticed that he was slim of body and had a fair complexion. My interpretation of the dream is that ‘Aziz means one who is honoured; and Sultan, who in the dream was understood to be the boy’s father, means a conclusive reason or argument such as is self-evident and carries its appeal to the hearts on account of its shining brightness. Sultan derives its meaning from authority and is not applied to every kind of argument but only to such a one as takes possession of the hearts on account of its acceptability and brightness and completely rules over gentle and reasonable minds. Thus the interpretation of the dream is that a Sign which will take possession of people’s hearts will be shown and its result, or, in other words, its child, will be that I will become dear to the hearts of people and this has been shown allegorically in my dream in the shape of ‘Aziz.” (Appendix, Tiryaqull Qulub, No,4 Page 2 footnote, Ruhani Khazain Volume 15, Pages 505,506 and Announcement of October 22, 1899, Majum’ah Ishtiharat, Volume 3, Pages 172-173)
Hazrat Mirza Bashir Ahmad stated:
Hadrat Sheikh Ya‘qub ‘Ali ‘Irfani ra writes: “The said dream has been published with a symbolic interpretation. He said clearly that he had seen ‘Aziz Ahmad son of Mirza Sultan Ahmad. (al-Hakam, March 10, 1906 page 1)
This is how the dream was fulfilled. At the end of February 1906, about six years after the dream, Hadrat Mirza ‘Aziz Ahmad, son of Hadrat Mirza Sultan Ahmad took the pledge of allegiance at the hand of the Promised Messiahas and joined the Ahmadiyyah Jama‘at. The fact that Mirza ‘Aziz Ahmad is shown in the dream in relationship to Mirza Sultan Ahmad also shows that it was destined that Mirza Sultan Ahmad would join the Jama‘at and thus become a spiritual, as well as physical, son. Alhamdulillah, he took the bai‘at at the hand of his younger brother Hadrat Khalifatul Masih IIra and joined the Jama‘at of the Promised Messiahas ” (Tadhkirah, Page 445)
He seems to have written an english translation in this edition of the ROR.
His son died recently, –Feb–2018