Family name Hitotsuyanagi (Hitotsuyanagi 
) , across the world, is a rare cognomen. The cognomen Hitotsuyanagi is habitual in Japan, where it is a rare surname, and the United States, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| Hitotsuyanagi | Japan, United States |
Ichiyanagi, Itiyanagi, ヒトツヤナギ, and 一柳
| yukio hitotsuyanagi researcher (ORCID 0000-0003-0017-4951) |
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| hitotsuyanagi nobutaka samurai, founder of the Hitotsuyanagi clan |
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| hitotsuyanagi naosato Hatamoto (一柳直里) |
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