Unlike the report of 918 , on this occasion the title mormaer is attached to a geographical area .
It is unknown whether the Angus of 938 was in any way similar to the later mormaerdom or earldom .
Unlike the report of 918 , on this occasion the title mormaer is attached to a geographical area , but it is unknown whether the Angus of 938 was in any way similar to the later mormaerdom or earldom .