Gods like Grannos, Borvo, and others, equated with Apollo, presided over healing springs, and they are usually associated with goddesses, as their husbands or sons. But as the goddesses are more numerous, and as most Celtic river names are feminine, female divinities of rivers and springs doubtless had the earlier and foremost place, especially as their cult was connected with fertility. The gods, fewer in number, were all equated with Apollo, but the goddesses were not merged by the Romans into the personality of one goddess, since they themselves had their groups of river-goddesses, Nymphs and Naiads. Before the Roman conquest the cult of water-divinities, friends of mankind, must have formed a large part of the popular religion of Gaul, and their names may be counted by hundreds. Thermal springs had also their genii, and they were appropriated by the Romans, so that the local gods now shared their healing powers with Apollo, Æsculapius, and the Nymphs. Thus every spring, every woodland brook, every river in glen or valley, the roaring cataract, and the lake were haunted by divine beings, mainly thought of as beautiful females with whom the _Matres_ were undoubtedly associated. There they revealed themselves to their worshippers, and when paganism had passed away, they remained as _fées_ or fairies haunting spring, or well, or river.[609] Scores of fairy wells still exist, and by them mediæval knights had many a fabled amour with those beautiful beings still seen by the "ignorant" but romantic peasant.