Cognomen Yagyu (Yagyu 
) , in all the world, is a rare family name. The last name Yagyu is habitual in Portugal, where it is a very rare surname, Japan, and Brazil. Not in comparison with a country's population, it most frequently occurs in Brazil, Japan, and the United States. Likewise, Yagyu is the forename as well as the last name.
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| Yagyu | Japan, Portugal, China, United States, Brazil |
| genichiro yagyu (b. 1943) |
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| alice kiyomi yagyu university professor and researcher active in Brazil, BR |
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| shigeki yagyu researcher (ORCID 0000-0003-4256-9783) |
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| hitomi yagyu researcher |
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| hiromasa yagyu researcher |
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| kiyoko yagyu researcher |
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| kyoko yagyu researcher ORCID ID = 0000-0001-5986-8734 |
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| takuki yagyu researcher |
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| takeshi yagyu researcher |
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| hiroaki yagyu researcher (ORCID 0000-0003-3518-6530) |
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