Adelphi (/əˈdɛlfi/; from the Greek ἀδελφοί adelphoi, meaning "brothers") is a district of the City of Westminster in London.[1] The small district includes the streets of Adelphi Terrace, Robert Street and John Adam Street.[1] Of rare use colloquially, Adelphi is grouped with Aldwych as the greater Strand district (a main street of London between the two areas and those immediately adjoining) which for many decades formed a parliamentary constituency and civil registration district.