EME

also ÆEM, ÆM, EAM, EAME, EEM, EEME, EM, EMME, EOM, EYM (Scottish), HEAM, HEEM, HEM, YEM

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From: A New English Dictionary on Historical Principles, James Murray:
Com. West Germanic: Old English éam = Old Frisian êm (Muddke Dutch oem, Dutch oom), Old High German ôheim (Middle High German ôheim, œheim, -hein, modern German oheim, ohm); 
if the word existed in Old Teutonic the type would be *auhaimo-z; presumed to be a compound or derivative of *awo-z = L. avus grandfather (of which the L. avunculus, uncle, is a diminutive) 
It is believed that the original sense of the West Germanic word was ‘mother's brother’ (cf. Latin avunculus); but in later use it is applied to a father's brother as well.

Beowulf (dated between the 8th and the early 11th century);
see below From: The Anglo-Saxon Poems of Beowulf: 
The Scôp Or Gleeman's Tale, and The Fight at Finnesburg
Edited by Benjamin Thorpe. 1855
P. 59

From: Littell's The Living Age
Volume XXIII, 1871
By Eliakim Littell, Robert S. Littell
The Bloody Mackenzie
P. 97