Northern Adelbert languages
family of languages

The Northern Adelbert or Pihom–Isumrud languages are a family of twenty languages in the Madang stock of New Guinea. The occupy the coastal northern Adelbert Range of mountains directly opposite Karkar Island, as opposed to the Southern Adelbert languages, another branch of Madang.
Malcolm Ross posited a "linkage" connecting the Northern Adelbert languages with the Mabuso languages, and named this group Croisilles , as the two families bracket Cape Croisilles (Northern Adelbert to the north, Mabuso to the south). However, Ross never claimed Croisilles was an actual language family, and other researchers have rejected the connection.
Languages
There are approximately 20 Northern Adelbert languages.
Below is a comparison of Northern Adelbert language names in Pick (2020) and Z'graggen (1980). A few alternate names from Capell (1952) are also given.
Classification
Croisilles was first posited by Malcolm Ross (1995), not as an actual language family, but as a linkage. It was a merger of Wurm's Pihom-Isumrud-Mugil and Mabuso stocks, each of which contained 25–30 languages. Pick (2017, 2020) and Usher reject the merger, and provisionally the inclusion of Mugil (Bargam), though Pick retains the name.
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This entry incorporates text from “Northern Adelbert languages” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.