Rogelse) seem to belong to the Christian period (Grimm, Deutsche Mythologie, i.
But in French story Helyas is not the son of Parzival, but of the king and queen of Lillefort, and the story of his birth, of himself, his five brothers and one sister is, with variations, that of "the seven swans" persecuted by the wicked grandmother, which figures in the pages of Grimm and Hans Andersen.
As regards the dentals and sibilants there are one or two rules which govern the interchange, in the manner of a Grimm's Law.
According to the system of phonetic changes generally known as "Grimm's law," an original b appears in English as p, an original bh as b.
It was left to Freron, Grimm, Prevost and others in 1754 to extend the idea to all foreign productions, and the Journal etranger (1754-1762) was founded for this purpose.