The Karstark family is a noble house in the fictional world of Westeros, created by author George R.R. Martin. They are sworn to House Stark and rule over the region of Karhold in the North. The family is known for their loyalty and strong sense of honor, traits that are characteristic of the Starks. The sigil of House Karstark features a white sunburst on a black field, symbolizing their connection to the Stark family. The house's motto is "The Sun of Winter," reflecting their resilience in the harsh northern climate. Key members include Rickard Karstark and his sons, who play significant roles in the series.