Angelica means "Angel" in Latin, but it has no meaning in Japanese.
You can spell it phonetically as アンジェリカ
'Japanese Angelica-tree' is a common name of 'Aralia elata' among English language speakers. In its native range, it's called 'tara-no-ki' in Japanese and 'dureup namu' in Korean. Its relative, the Devil's Walkingstick or Angelica-tree [Aralia spinosa], is native to eastern North America.
Angelica mean in Tagalog: anghel
Angelica McDaniel's birth name is Angelica Rosas.
Angelica Jones's birth name is Angelica Alavar.
Angelica 'Medieval Latin (herba) angelica, angelic (herb), angelica, from Late Latin, feminine of angelicus, angelic, from Late Greek angelikos, from Greek, of a messenger, from angelos, messenger
Angelica Heart's birth name is Tamara Herpai.
Angelica Bridges's birth name is Angelica Jo Bridges.
Angelica Chitwood's birth name is Angelica Rose Chitwood.
'Aralia elata' is the scientific name of the Japanese Angelica-tree. The shrub or small tree is native to Russia, Korea, Japan and China. The woody plant's shoots are considered delicious parts of Japanese and Korean cuisines. In Japan, it's called 'tara-no-ki'. In Korea, it's called 'dureup namu'.
"Olga" is not a Japanese word or name, so it doesn't mean anything at all in Japanese. Did you mean, "What is the name "Olga" translated to in Japanese?"
Angelica Costello's birth name is Crystal Craft.
The name Michelle does not mean anything in Japanese, but can be written: ミシェル