Count of Tresmes 1630-1648, duke of Tresmes 1648-1669 (1579-1670)
Blazon: Per quarterly I azure a bend argent* between two wyverns rampant or (Baillet), II or in the dexter corner of a chief gules an escutcheon of Montmorency, the dexter chief quarter argent a molet of five points sable (Aunoy), III or a cross gules between sixteen alerions azure (Montmorency), IV argent a chief gules surmounted by a lion rampant azure (Vendôme), overall in the fess point an escutcheon azure three dexter hands couped or surmounted by a quarter chequy of argent and the field (Potier)
*Although it is shown here as or, the blazon specifies argent.
Blazon: Per fess or and argent, in chief to the sinister a sun issuant from the partition line gules, in base a lymphad of the last; on a quarter sable a castle of three towers of the second
Crest: On a wreath argent and sable, in front of a lighthouse on a rock, a seagull volant proper
Mantling: Sable lined argent
Supporters: On the dexter, a lion rampant guardant azure, armed and langued gules, collared or, pendant therefrom an escutcheon of the second charged with a chevron argent between three clarions of the third; on the sinister, a wolf rampant argent, collared gules, pendant therefrom an escutcheon sable charged with a fess ermine