This name is a Polish equivalent of the Latin name Adalbertus. Wojciech was a knight who became a monk and lived in Germany, Poland and Czechy. He was the first missionary who travelled from Poland to Prussia (north-east of Poland, presently a part of Poland) to convert local people to christianity in 9th-10th century. He was murdered and became the first saint of Poland.
(Sent from Yasni user)