The explanation of this use, which seems to be entirely English and unknown to French, is not clear; but it answers to the English use of good in goodsire (gudscher, gutcher), gooddame (gudame), ‘godson or gosson filiolus,’ and ‘goddowter filiola,’ in Promp. Parv., which is again partly paralleled by the modern French bon-papa, bonne-maman, grandpapa, grandmamma. The French and English use of grand, in grandpère grandfather, grandsire, grand'mère grandmother, grandame, is capable of more obvious explanation; while the tendency to allow analogy to prevail over sense appears in the English grandson as compared with French petit-fils. Still further analogies in the parallel use of beau, belle, and good (though to express a different relationship) are presented by the French beau-père father-in-law, belle-mère mother-in-law, beau-frère brother-in-law, etc., for which the northern English and Scottish forms are good-father, good-mother, good-brother, good-sister, etc.