• Alan Gelfand, the inventor of the ollie, a skateboarding move
• Boris Gelfand, a chess grandmaster
• Israel Gelfand, a mathematician
• Vladimir Gelfand, a Ukrainian-Jewish writer
• Gelfand representation, in mathematics, something that allows a complete characterisation of commutative C*-algebras as algebras of continuous complex-valued functions
• Gelfand-Naimark-Segal construction
• Gelfand–Naimark theorem
• Gelfand-Mazur theorem
• Gelfand pair, a pair (G,K) consisting of a locally compact group G which is unimodular, and a subgroup K which is a compact group
• Gelfand triple, a construction designed to link the distribution (test function) and square-integrable aspects of functional analysis

See also

• Alexander Gelfond
• Helfand