“Teknon” means “child”. The word the bible uses is “Tekton”. “Tekton” could mean a builder, but most generally means ‘carpenter’. Jesus was from a small town that mostly built with wood at the time, so there’s little chance he was a mason, the other dominating meaning. Here are hundreds of examples of the word “tekton” used in pre-biblical sources. Judge for yourself: http://www.perseus.tufts.edu/hopper/wordfreq?lang=greek&lookup=te%2Fktwn