Coat of Arms & Family Crest Details
J. B. Rietstap, Armorial Général, Gouda: G. B. van Goor Zonen, 1884–87
Blazon (the actual original written record)“Bandé de gu. et d'arg. Cq. cour. C.: trois pl. d'aut. d'arg.”
A record of documented arms, meaning and origin, researched for the Kosa family of Poland.
J. B. Rietstap, Armorial Général, Gouda: G. B. van Goor Zonen, 1884–87
Blazon (the actual original written record)“Bandé de gu. et d'arg. Cq. cour. C.: trois pl. d'aut. d'arg.”

The Kosa arms were recorded in Poland, c. 1772.
Arms such as these were typically recorded in Mazovia.
Mazovia held Warsaw, the Polish court and the assemblies where the szlachta met. Poland's nobles were unusually numerous and every one of them bore arms, and Warsaw is where those arms were argued over and recorded.
This is where the arms were entered in the register. Families often moved to other parts of the country, so the same name can turn up in more than one region.
Polish noble families shared a single coat of arms across many different surnames, creating large clans rather than individual designs. These symbols were held collectively by all members of the clan regardless of their specific family name. When a new family joined the nobility, they were adopted into an existing clan and began using that group's established shield.
The family name Kosa has deep roots in the Mazovia region of Poland, where records confirm members of the family were living as early as 1772. The name itself is derived from the Polish word for a scythe, which was a common agricultural tool essential to the rural life of the time. In the eighteenth century, Mazovia was a central hub for farming and trade, and families often adopted surnames that reflected their daily work or the tools they used to sustain their households. Because the scythe was a vital instrument for harvesting grain, it is likely that the name originated as a descriptive nickname for a skilled laborer or a landowner who managed large fields. Over time, this identifier became a permanent family name, connecting the Kosa lineage to the hardworking history of the Mazovian plains.
A long-handled agricultural tool used for cutting grass or grain.
