It may also refer to:

• "The Golden Wedding" (La Cinquantaine), a piece of music composed by Jean Gabriel Marie in 1887.
• La Cinquantaine, a 1771 play by Desfontaines-Lavallée.

• British North American
• British & North American Royal Mail Steam Packet Company
• British North America (Quebec) Act 1774
• British North Borneo Company
• British north borneo dollar
• British NRP
• British N scale
• British Nuclear Group
• British nuclear tests at maralinga
• British Numismatic Society
• British Nursing Assn v Inland Revenue
• British Nursing Association v Inland Revenue
• British NVC community A10 (Polygonum amphibium community)
• British NVC community A12 (Potamogeton pectinatus community)
• British NVC community A14 (Myriophyllum alterniflorum community)
• British NVC community A15 (Elodea canadensis community)
• British NVC community A16 (Callitriche stagnalis community)
• British NVC community A18
• British NVC community A18 (Ranunculus fluitans community)
• British NVC community A19 (Ranunculus aquatilis community)
• British NVC community A1 (Lemna gibba community)
• British NVC community A20 (Ranunculus peltatus community)
• British NVC community A21 (Ranunculus baudotii community)
• British NVC community A23 (Isoetes lacustris/setacea community)
• British NVC community A24 (Juncus bulbosus community)