Other scholars have pointed out that Charlemagne's mother, Bertrada of Laon, came to be known as the goose-foot queen ( regina pede aucae). In the 20th century, Katherine Elwes-Thomas theorised that the image and name "Mother Goose" or "Mère l'Oye" might be based upon ancient legends of the wife of King Robert II of France, known as "Berthe la fileuse" (" Bertha the Spinner") or Berthe pied d'oie ("Goose-Footed Bertha" ), often described as spinning incredible tales that enraptured children. Additional 17th-century Mother Goose/Mere l'Oye references appear in French literature in the 1620s and 1630s. His remark, comme un conte de la Mère Oye ("like a Mother Goose story") shows that the term was readily understood. An early mention appears in an aside in a versified French chronicle of weekly events, Jean Loret's La Muse Historique, collected in 1650. English readers would already have been familiar with Mother Hubbard, a stock figure when Edmund Spenser published the satire Mother Hubberd's Tale in 1590, as well as with similar fairy tales told by "Mother Bunch" (the pseudonym of Madame d'Aulnoy) in the 1690s. Mother Goose's name was identified with English collections of stories and nursery rhymes popularised in the 17th century.