Norwegian: habitational name from any of several farmsteads named Lærum or Lerum, from Old Norse Leirheimr, a compound of leira 'clay' + heimr 'farmstead', 'dwelling'. Norwegian: habitational name from any of several farmsteads named Lærum or Lerum, from Old Norse Leirheimr, a compound of leira 'clay' + heimr 'farmstead', 'dwelling'. Norwegian: habitational name from any of several farmsteads named Lærum or Lerum, from Old Norse Leirheimr, a compound of leira 'clay' + heimr 'farmstead', 'dwelling'. Norwegian: habitational name from any of several farmsteads named Lærum or Lerum, from Old Norse Leirheimr, a compound of leira 'clay' + heimr 'farmstead', 'dwelling'. Norwegian: habitational name from any of several farmsteads named Lærum or Lerum, from Old Norse Leirheimr, a compound of leira 'clay' + heimr 'farmstead', 'dwelling'. Norwegian: habitational name from any of several farmsteads named Lærum or Lerum, from Old Norse Leirheimr, a compound of leira 'clay' + heimr 'farmstead', 'dwelling'. Norwegian: habitational name from any of several farmsteads named Lærum or Lerum, from Old Norse Leirheimr, a compound of leira 'clay' + heimr 'farmstead', 'dwelling'. Norwegian: habitational name from any of several farmsteads named Lærum or Lerum, from Old Norse Leirheimr, a compound of leira 'clay' + heimr 'farmstead', 'dwelling'.