1. Given name

2. Nature

Dayana may refer to:

Given name

• Dayana (pronunciation d̪ɪɑɴɑ, Language Hebrew, the Judge) variant of the given name Diana
• Dayana Borges (born 1990), Venezuelan model
• Dayana Cadeau (born 1966), Haitian-born Canadian American professional bodybuilder
• Dayana Colmenares (born 1984), Miss Venezuela International 2007
• Dayana Mendoza (born 1986), Venezuelan Miss Universe 2008 and contestant on Celebrity Apprentice
• Dayana Yastremska (born 2000), Ukrainian professional tennis player

Nature

• Laudakia dayana, species of Agamid lizard found in Haridwar, India
• Sophronitis dayana, species of orchid endemic to Brazil (southern Minas Gerais to Rio de Janeiro)

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