Eventually however, by the 1300's it did become hereditary. The surname Young could fit this category. If a father and son had the same Christian name, the son would often be called by the surname Young to distinguish him from his father. The fourth type is a nickname referring to something distinguishing about the person. For example if two people had the same Christian name, the one who was younger would receive the Young surname.
Surnames designating relationships are the most common type in Scotland.
After the marriage of King Malcolm lll to the Saxon Princess Margaret around 1070, English dress, and speech became fashionable in lowland areas of Scotland, Thus, the use of other forms of the name Young, such as Og, Tenuit, etc. would have decreased. Many people moving into a new area would adopt local names. One example is of a man named Ljungwaldh. He moved to Scotland from Stockholm and the English speaking natives had difficulty with his name. He eventually changed it to Young.