That name NDP looks little bit confusing. For example, wikipedia article https://en.wikipedia.org/wiki/Neighbor_Discovery_Protocol shows NDP as Neighbor Discovery Protocol, even when RFC-s themselves don't use that abbreviation.
Yes, it was a poor choice of name. It was originally just a placeholder in the htsim code, from New Datacenter Protocol, but we avoided choosing a better name for too long and had already talked about it as NDP to enough people (especially research funding people) that we decided it would be confusing to change. With hindsight, we should have changed it earlier. Later on we did change the name of its derivative to EQDS.