Old French custume

← Old French coustume (mention)

← Proto-Indo-European *dʰeh₁- (root)

← Proto-Indo-European *ḱóm (derived)

← Proto-Indo-European *swe-dʰh₁-sk- (derived)

← Proto-Indo-European *swé (mention)

← Proto-Indo-European *dʰeh₁- (mention)

← Old Latin com (derived)

← Proto-Italic *kom (derived)

← Latin *costūmen (mention)

← Latin cōnsuētūdinem (inherited)

← Latin cōnsuētūdō (mention)

← Latin cōnsuēscō (mention)

← Latin con- (mention)

← Latin suēscō (mention)

← Latin con- (mention)

← Latin cum (mention)

← Latin suēscō (mention)

← Latin suus (cognate)