Bonjour. According to TLF: #the french word douille (socket, case, pastry bag) is reported as early as on the XIII century, prob. from German dulja>doelle; #andouille (tripe sausage) is known from the XII century, prob. from the latin inductil/e/ia. Ignoring the acquired metaphoric meaning of each word, the original ones do not look so far from each other. Any etymo news ? Thanks.