Reconstructing the life of David Aboab, the son and grandson of Venetian rabbis in the mid-18th C, is a challenge for historians. There are records of a person of this name in Curaçao ca. 1745, but he was quickly caught up in the torments of a community in conflict and expelled. A few years later, Aboab can be traced to London, a convert to Hutchinson's non-conformist Christianity and a valuable and learned asset for the Huntchinsonians, whose biblical interpretation was based on a curious anti-Jewish Hebraism. The difference in tone between the various works signed with this name is however significant enough that the notion of a single author behind the writings or a single man behind the biographical elements remains questionable. If there was indeed only one Aboab, would it not have been difficult but necessary for him to take advantage of the specialized knowledge that constituted his only social capital and gave coherence to his scattered life story ?