Æthelmær is an Old English name borne by many males in Anglo-Saxon and post-Conquest England, including:
Æthelmær the Stout (died 1015), ealdorman, son of Æthelweard the historian Æthelmær, brother of Eadric Streona (died 1017) Eilmer of Malmesbury, or Æthelmær (fl. 1066), monk who experimented with aviation Æthelmær of Elmham (fl. 1047-1070), bishop of Elmham and brother of Stigand Herlewin, or Æthelmær, (died 1137), theologian