þán
This might be just a supplemental entry adding to an entry in the Main Volume.
In the OE text, the length is:indicated by acute accentsindicated by macronsnot indicated.
þán
Add: watered, having water (of land) 'Geýc mé and syle mé þán land.' Þá sealde se fæder hire þán and leóht bufan and þán and leóht beneoðan ... Seó sáwel bideð æt ðám fæder þánes landes and wǽtes 'junge irriguam (terram)'. Dedit ei pater suus irriguum superius et irriguum inferius ... anima a patre terram irriguam petit, Gr. D. 245, 19-23. Seó sáwel onféhð þán and wǽt bufan ... and heó onféhð þánum and wǽtum beneoðan, 246, 10-12.
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A Combined List of Abbreviations.

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A Combined List of Abbreviations.