The family coat of arms includes a shield in silver with three green box trees in pyramid form, planted beside each other in the ground. In 1935 the predecessors of the present-day members of the board of the foundation established by family decision the trees in the shield to be box trees. In former depictions of the coats of arms in the 18th, 19th and 20th centuries all kinds of variations in trees, colours and metals appeared.

The oldest known seal stamps in the second quarter of the 19th century show a shared coat of arms. On one side one can see the coat of arms of the Retemeyer family with a silver anchor and two stars above it and at the other side the Boissevain coat of arms.

The heraldic device reads as follows in the old French language: Ni regret du passé, ni peur de l'avenir (Neither regret the past, nor fear the future).