Group A runes were most common in Viking Age Denmark
Old Norse Kolr (m.)
Kolr is a common male personal name in Norway and Iceland. It is probably related to the Old Norse noun kol ‘coal’ and is attested as the first element in the hybrid name Colston (Bassett) and (Car) Colston in Nottinghamshire. It is also attested as the first element in other Old Norse names, such as Kolbeinn.