All are in unison incorporating the 'spiny'; 'spur' element in their names for the spiny dogfish; spurdog (Squalus acanthias). #Cornish: drenek literally means 'thorny' with #Welsh: dreiniog and #Breton: dreinek both "thorny" being cognates. #Cymraeg: pigog =spiny #Brezhoneg #Kernewek #langsky #fish