Assuming the view that Avraham was not a Jew (see here and here1), "ha-nefesh asher asu beCharan" (Gen. 12:5) that Rashi explains were converts, what did they convert to? To give credit where credit ...
Rashi to B'reshis 12:5 quotes Rav Huna: "... whom they brought [to Judaism]. Avraham was converting the men and Sara the women...". My understanding is that nowadays female prospective converts study ...
We read how Avraham was going around convincing people to believe in one G-d and of his many students. Yet we don't hear of those students (or their descendants) ever again. What happened to them ...
Avraham Avinu is often called "the first Jew". When did he become Jewish. Was it when: He recognized G-d? G-d spoke to him for the first time? Covenant Between The Parts? When G-d changed his name? ...