North Sea Germanic, also known as Ingvaeonic, is a subgrouping of West Germanic languages that consists of Old Frisian, Old English, and Old Saxon, and their descendants. These languages share a number of commonalities, such as a single plural ending for all persons of the verb, the Ingvaeonic nasal spirant law, common changes to the Germanic vowel *a, a plural form -as, and a number of other features which make scholars believe they form a distinct group within West Germanic.