What is "morham"

Morham, East Lothian, sometimes spelt Moram, Morum, Morhame, etc., in old records, is the smallest (agricultural) parish in Scotland, sandwiched between five other parishes: Haddington, Garvald, Yester, Whittingehame, and Prestonkirk, in the undulating lower reaches of the Lammermuir Hills.