A number of such legal principles, which most likely were widespread in early Celtic laws, can be reconstructed with reasonable degrees of probability. They are mostly centred around kinship and contractual relations, although we have some ideas about criminal law and legal procedure as well. For all of these, we also find reasonably similar principles in either Roman and/or Germanic laws, and in most cases also in other Indo-European laws, making it quite likely that these reconstructions are roughly accurate, even if they lack in detail. Given that many, if not most of them come with an internal Celtic cognate terminology, it is unlikely that they actually are late loans from e.g. Roman provincial law, although some crossovers in legal customs should be assumed. In at least some cases, e.g. in contract law, a co-evolution of Roman, Germanic and Celtic legal systems, based on intensive contact, is likely, even though the contract laws of each subgroup of these larger collectives may already have started out reasonably similar.