[Talvinen]

Всё нашла и про Maura в том числе.
Frodo. On the other hand the H. name was Maura. This was not a common name in the Shire, but I think it probably once had a meaning, even if that had long been forgotten. No word maur- can be found in the contemporary C.S., but again recourse to comparison with the language of Rohan is enlightening. In that language there was an adjective maur-, no longer current at this time, but familiar in verse or higher styles of speech; it meant 'wise, experienced'. I have, therefore, rendered Maura by Frodo, an old Germanic name, that appears to contain the word frōd which in ancient English corresponded closely in meaning to Rohan maur.
Спасибо огромное за подсказку, где смотреть!