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This Proto-Ryukyuan entry contains reconstructed terms and roots. As such, the term(s) in this entry are not directly attested, but are hypothesized to have existed based on comparative evidence.
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Proto-Ryukyuan
Etymology
Cognate with Japanese 従兄弟 (itoko, “cousin”), but whether it's inherited from Proto-Japonic is unclear due to irregular phonetic developments.
Noun
*itoko?
- cousin
Descendants
- Northern Ryukyuan:
- → Kikai: 従兄弟, 従姉妹, 愛子 (ituku)
- Kunigami: 従兄弟, 従姉妹, 愛子 (hichīkū)
- → Northern Amami Ōshima: 従兄弟, 従姉妹, 愛子 (itoko)
- Okinawan: 従兄弟, 従姉妹, 愛子 (ichuku)
- → Okinoerabu: 従兄弟, 従姉妹, 愛子 (itoko)
- → Southern Amami Ōshima: 従兄弟, 従姉妹, 愛子 (itoko)
- → Tokunoshima: 従兄弟, 従姉妹, 愛子 (itōko)
- Yoron: 従兄弟, 従姉妹, 愛子 (ichū)
- → Southern Ryukyuan: *ituku