Pen
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Pen Oyle
Home of the giant Oyle. The place cannot be identified with certainty.
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Pen Palach
'Cudgel Head'A monster slain by Arthur in the halls of Dissethach.
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Pen Rhionydd
Penrhyn RhionyddArthur’s northern capital, according to the Triads.
It may have been in Scotland. Its name suggests that it is a cape, or the tip of a peninsula.
The Welsh pen, in geographical names, means the highest part or the extreme end, as of a mountain, a field, or a meadow. In Scotland there is ben, 'a mountain'; Gaelic cen or cenn with the same meaning as pen and ben. Some Scottish places are Benmore (Penmawr), 'great mountain'; Pencraig, 'top of the rock'; Penpont, 'end of the bridge', and so on. European names gives us information about the earlier Celtic settlements, such as Pennine, Penne, Penmark, and Apennines.