His father was Charles de La Fontaine, maître des eaux et forêts – a kind of deputy-ranger – of the Duchy of Château-Thierry; his mother was Françoise Pidoux.
Babai i tij ishte Charles de La Fontaine, - një lloj i zëvendës të endacak - i Dukatit të Château të Thierry, nëna e tij ishte Françoise Pidoux.