Paide is a town in Estonia and the capital of Järva County, one of the 15 counties of Estonia. Paide's German name Weißenstein means 'whit…Paide is a town in Estonia and the capital of Järva County, one of the 15 counties of Estonia. Paide's German name Weißenstein means 'white stone'. This name was derived from the limestone used for the construction of Paide Castle. A Latin translation, Albus Lapis, has also been used. The Estonian name Paide was first recorded in 1564 as Paida. It is thought to derive from the word paas, pae, meaning 'limestone'.