Tenkergynpilgyn – a lagoon at the mouth of the Amur River (in Chukchi Tankergyn Pilgyn – “Tankergyn Neck”), Chukchi Autonomous Area, Russia. T. lagoon is the biggest of the Chukchi Sea coastline; it spreads along the coast for 65 km southwest off Akatan Lagoon. T. Lagoon is connected by narrow distributaries with Akatan and Amguema lagoons. The southwest coast of T. is hilly with occasional bogs. Sea connection is due to the Pilgyn Strait located 58 km southeast of Cape Schmidt. The width of the strait is around 300 m, and depths are 2.5–3 m, up to 8 m in some places. T. is named after a Chukchi who lived near the lagoon. The Russian name is Two Pilots’ Sandspit.