This cite should help http://wiki.name.com/en/Ella :)
Ella is a European name, not Asian. So there simply is no Japanese name that correlates with 'Ella'.
Ella Shields's birth name is Ella Buscher.
Ella Arolovi's birth name is Ella Arolovich.
Ella Eyre's real name is Ella McMahon.
" Umbrella " is the meaning of the name Ella.. Because Ella, Ella, eh eh .. Under my Umbrella..
Ella Sinise's birth name is Ella Jane Sinise.
Ella Vaulchikova's birth name is Ella Petrovna Vaulchikova.
Ella Reid's birth name is Ella M. Reid.
Ella Wahlestedt's birth name is Ella Linnea Wahlestedt.
Ella Raines's birth name is Ella Wallace Raines.
Ella Neal's birth name is Ella Lucile Neal.
Ella Nekrasova's birth name is Nekrasova, Ella Georgiyevna.