It is also uncertain to which language family the ancient Meroitic language is related. Kirsty Rowan suggests that Meroitic, like the Egyptian language, belongs to the Afroasiatic family. She bases this on its sound inventory and phonotactics, which, she argues, are similar to those of the Afroasiatic languages and dissimilar from those of the Nilo-Saharan languages. Claude Rilly proposes, based on its syntax, morphology, and known vocabulary, that Meroitic, like the Nobiin language, belongs to the Eastern Sudanic branch of the Nilo-Saharan family.