Mostowlany ([mɔstɔˈvlanɨ]; Lithuanian: Mastaulėnai) is a village in the administrative district of Gmina Gródek, within Białystok County, Podlaskie Voivodeship, in north-eastern Poland, close to the border with Belarus. It lies approximately 16 kilometres (10 mi) east of Gródek and 49 km (30 mi) east of the regional capital, Białystok.

• Konstanty Kalinowski (known in Belarus as Kastuś Kalinoŭski; 1838–1864), a writer, journalist, lawyer and a leader of the Uprising of 1863.

• Merkys, Vytautas (2018). "Konstantinas Kalinauskas". Universal Lithuanian Encyclopedia (in Lithuanian).