Based on the handwriting, possibly, of Juan de Yciar of Spain, 1600 CE.
There are about 100 ligatures, give or take, that work right now.
What I don't know how to do is implement contextual alternates/swashes/titling alternates in a way that doesn't make Fontlab explode :) I have multiple alternates, starting swashes and ending swashes, but I don't know how to make them work.
I have them sitting there in the file listed as:
How do you get an alternate of a swashed ligature? (This e_z swash has a tail that goes up, but this one has a tail that goes down...)
I think I would like it to work with dligs etc., so that the variations are still selectable via the Opentype panel.