hwamm
This might be just a supplemental entry adding to an entry in the Main Volume.
Related §§ in Wright's OE Grammar:
In the OE text, the length is:indicated by acute accentsindicated by macronsnot indicated.
hwamm
AddIc mé ána gestód on sumum hwomme þæs cafertúnes, Hml. S. 23 b, 422. Hwommas angulos, Germ. 403, 14: porticus, 396, 175.
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A Combined List of Abbreviations.

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A Combined List of Abbreviations.