For this Foster Jill there are 2 different names on Yasni.
In the ranking of the most common first names Foster Jill is on position 4589.
Male first name (English), (?) Foster, the guest, the stranger, Old High (Word format); guest = the guest, the stranger; origin settled not sure, has long been common in France, but probably with Germanic roots, but could be derivation of 'Gascony' (originally 'Vasconia'), the name of a region in France
Female first name (English): Jill, Latin (Roman epithet), information on male form Julian, originally from 'Julius' derived Roman epithet 'Julian', known by the Roman Emperor Julian (Flavius Claudius Julianus)