So sorry to hear about the pushback. After all the work that's been done on Cymru to get names right, the idea of sacrificing accuracy for a slight perceived convenience is appalling. The work-around on patronymics that was used both for Welsh names and I see for some Hebrew patronymic names is to add it to the first name, so for Dafydd ap Gruffydd becomes Last Name=Gruffydd and first name becomes Dafydd ap. Which of course violates the policy that first names should only be one word.
The reason I brought it up here is that Babylonian Jewish names of the 300's and 400's are really a separate group of people, they're not Euroaristo, they're not Persian or Arabic, so they could have their own policy consistent with patronymics. One alternative is that since most of them claim descent from King David, sometimes their last name is shown as ha David or simply David. If one went that way, you would have the same problem you mentioned with Cymru -- for people who were known as Haninai ben Abraham, etc. you'd have to look for every single one under "D" for David (or "H" for "ha") as the LNAB. I"d rather look under ben for the men and bat for the women!
But without a policy, the LNABs are all over the map and only with intensive research do you discover who the duplicates are.
