Hmmm... An interseting question, but I think I'd say they are the "universal" or Christian virtues in this case, especially given Tolkien’s Catholic faith, they would most likey have to be. (Darn this is gona get complicated). I would highly doubt that they anything to do with say for example Buddhist virtues:
(Noble Eightfold Path)
Right Viewpoint - Realizing the Four Noble Truths (samyag-dṛṣṭi, sammā-diṭṭhi)
Right Values - Commitment to mental and ethical growth in moderation (samyak-saṃkalpa, sammā-saṅkappa)
Right Speech - One speaks in a non hurtful, not exaggerated, truthful way (samyag-vāc, sammā-vācā )
Right Actions - Wholesome action, avoiding action that would do harm (samyak-karmānta, sammā-kammanta)
Right Livelihood - One's job does not harm in any way oneself or others; directly or indirectly (weapon maker, abortionist, drug dealer, etc.) (samyag-ājīva, sammā-ājīva}
Right Effort - One makes an effort to improve (samyag-vyāyāma, sammā-vāyāma)
Right Mindfulness - Mental ability to see things for what they are with clear consciousness (samyak-smṛti, sammā-sati)
Right Meditation - State where one reaches enlightenment and the ego has disappeared (samyak-samādhi, sammā-samādhi
Doesn't look very likely. But that could just be me.
~Beleg
σωφροσύνη (sōphrosynē )
φρόνησις (phronēsis)
ἀνδρεία (andreia)
δικαιοσύνη (dikaiosynē )
-EDIT 200th post! And it only took me two years 