I know the writing and spellings are all over the place, but I'm still puzzled about Tabitham: why the random use of Latin, and if it is that, why accusative (-am) rather than nominative (-a)?
And in the surname, I'm just not seeing 'ff' (= 'F'). All the other examples I can see of that have two strong vertical strokes, yet here there seems to be just one, and not particularly strong. I accept that my earlier suggestion of Wingtersham involves a lower-case 'w' as the first letter (far from uncommon in old registers), and I could just about take the 'gt' to be lower-case 'f', but that would still leave the Tabitha/m anomaly.