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"Abugov (Grodno, Igumen, Bykhov, Klimovichi, Kiev) N: Abuhov is the Ashkenazic phonetic form of the Sephardic surname Abohab, derived from `donator' [Arabic]. The surname has existed since the 13th century (Laredo, 189) {Abuev, Bugov}." http://www.avotaynu.com/books/DJSRE1SamplePage.pdf Abuhov and Abugov are interchangeable.
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