The Žemaitijan nobility of the 15th to the 18th centuries included several heraldic groups: a group of local origin; Polish coats of arms; personalised Polish coats of arms; and coats of arms that were imported/adopted from other countries. This article focuses on the second and fourth groups, which include coats of arms that could be described as ‘imported’, ‘foreign’ or ‘alien’. The article aims to discuss the prevalence and use of these coats of arms in the heraldic tradition of the Žemaitijan nobility of the 16th to the 18th centuries. The adoption of Polish heraldry was already evident in the first half of the 16th century. The Horodło coats of arms entered the heraldry of the Žemaitijan nobility. Also, Polish coats of arms were brought to the country by Polish noble families. The number of those who came to Žemaitija from Germanspeaking lands was very small, and this meant that their heraldic sources were not abundant. On the other hand, surviving heraldic sources indicate that these newcomer families usually only used their own coats of arms.