Ivan Belyayev may refer to:
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Ivan Belyayev (runner) (born 1935), Soviet athlete who competed in steeplechase
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Ivan Belyayev (footballer) (born 1986), Russian footballer
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Juan Belaieff
Juan Belaieff (; 19 April 1875 – 19 January 1957) was a Russian and Paraguayan explorer, cartographer and soldier, notable for his investigation and mapping of the Gran Chaco region and for his role in the Paraguayan army during the Chaco War. ...
(Ivan Belyayev; 1875–1957), Russian and Paraguayan cartographer and soldier
{{Hndis, Belyayev, Ivan