My Huguenot family interest is with the Laffon family who seem to be associated with Castres en Tarn and Bordeaux, and one of whom, Susan Laffon married my gggg-gpa, Wm Magrath, in Dublin in 1758.
She appears in the will of John Nairac (1724- d1792 Dublin, and whose father Jean Nairac, 1675-1757, was a noted Bordeaux sugar merchant), where it states that her father Philip Laffon was his cousin. This would make Philip a brother of Alexandre Laffon de Ladebat, who appears in Wikipedia.
I don't know whether Philip Laffon or his daughter Susanne were actually born in France or Ireland or elsewhere, or where they died for that matter. There is a potential sister to Susanne - Marianne b1739 Dublin - but not proven. My research has produced lots on the Nairac family and their relationship to the Laffons - but of Philip and family...nul.
Alexandre Laffon (b1719 Bordeaux, likely brother of Philip) studied in Holland and it is quite possible that bits of the Laffon & Nairac families went to Holland before appearing in Dublin.
I found a ref to Jean Nairac senior suggesting that he became resident in Dublin before 1721 (http://gallica.bnf.fr/ark:/12148bpt6k5701797q/texteBrut[148
REVUE DUE DEPARTEMENT DU TARN] )
I don't know what Philip Laffon's occupation was. My gggg-gpa was a government solicitor and the male children I know of were a solicitor and 2 lieutenants in the Dragoons, one of whom died in France in 1795.
Any help/guidance on where to investigate further would be much appreciated - esp for France and Holland where I have little experience.