I am a member of this particular branch of the Tonge family.
You probably know the following but for those that may not and may be interested here is some background information.
My great, great, great (I think I have that right) grandfather founded Tonge & Taggart. The Taggart side died off and my uncle Claude, Thomas (Max) my father's brother was the last managing director before it and the group Tonge McLaughlin Holdings was sold to the Smurfit Group.
The original Tonge (father of the above) started in the coachbuilding business in Little or Great Brittan Street in Dublin.
We beleive that we had come over from Yorkshire around the 1800's. A Thomas Tonge had married an Ellan Maxfield (my father's name). It is thought that they had arrived in Yorkshire from France with the Huguenots (possibly coachbuilders) some two hundred years before.
There is of course a town named Tonge in Yorkshire and a further four Tonge towns/villages around England.
So are we French originally? Well in the Domesday Book, the very first census in England commissioned by William the Conqueror in 1085 to optimise on tax collection, there is a mention of a Tonge as a landowner, so maybe it is originally an English name?