NEuropean IE for apple

What's the correct stem for apple in Northern IE languages? What can be deduced ?

 

OE aeppel = OHG apful < *Germ. appola-

ON epli < *Germ. *aplijan? *apilan? <*abelon, *abelion ?

Crimean Gothic apel < *?

Old Irish ubull, Welsh afall, afal

Old Slavic ablUko < *a:blu-ko-

Lithuanian obuolas Latvian a:buols < *a:bo:los

Lithuanian obelis < *a:belis, a:belyos

OPrussian woble < *a:bl-

Abella, city that was called "malifera" by Virgil.

 

 

Joao SL