Just checked the wiki, looks like France defines something called double jus soli, which means a person who was born in France to a parent who themselves is born in France (even though they might not be a French citizen) gets the citizenship.

That's a bit closer to birthright citizenship that what we have in Germany, but nowhere as liberal as USA laws, which give citizenship to anyone born in the USA even if their parents entered the country one day before the birth and left next day after the birth. That is something that doesn't exist anywhere in Europe to my knowledge.

France has a mixture of jus soli and jus sanguinis, like most countries. Pure jus soli, as in the American case, is in fact quite rare.

Don't think Initially Donald's granddad was that rich.

And to follow up German immigrants where not liked as the liked their beer and some where gasp Catholic

Nativists campaigned against incomers from Europe