These are not primary sources, but I note that the following online trees have 1744:
http://www.tzorafolk.com/genealogy/html/dat59.htm#6
http://wc.rootsweb.ancestry.com/cgi-bin/igm.cgi?op=GET&db=gabri...
I have added references to those to the profile About Me.
There are many people working in this area, and many online trees.
Some are using original sources; others are probably copying from each other.
I have merged quite a lot of profiles in this area - including many of yours, Mark. It's distantly related to me - and very interesting!
That profile alone has six managers - all of whom had separate trees that I probably merged - or stacked for someone else to complete the merge.
We could do with a project for these Spanish-Portuguese Sephardi profiles so we can all work together better and have project discussions. I hope one of my curator friends with project expertise is reading this and may help out ...