Who was יוסף גר צדק and who was his famous son and even more infamous Ancestor?
closed as not constructive by Isaac Moses Jun 17 '11 at 21:50
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His son: R' Akiva.
His infamous ancestor: Sisera.
(See discussion, with sources, in Hyman's Toldos Tannaim V'amoraim, s.v. R' Akiva.)