Having seen it mentioned as a source all over the place, I was very excited about the “Genealogia Hebraica. Portugal e Gibraltar” by Jose Maria Abecassis (ISBN 9729542902).
A few weeks ago I found that Claude Bensaude had taken a look at it. His opinion of Abecassis’ work is very low. Horrified by the amount of imprecisions and factual errors he told me he began annotating the book with corrections, but after a dozen pages he gave up discouraged by the amount of corrections needed.
So if you wish to use the Genealogia Hebraica as a source for your genealogical research, be sure to cross it with other independant sources and take it with a grain of salt.