^^
Oops, sorry. I skipped with the letter replacement.
I'll explain it.
as we know, that in Japanese, there are no "J, L, Q, V, X"
So,
for J (dj not yot), we use ”ジ” +little vowel
for L, we replace it with "R" letter, for example, "Luna" will be "Runa" (ルナ)
and if the letter L in the end or in the middle, just replace it with "Ru" (ル), e.g. Michael will be "Mikaeru" (ミカエル)or Alfred will be "Arufuredo" (アルフレッド)
for V, we replace it with vowel "U" but with double apostrophe + the little vowel ( ヴ has sound like V)
e.g Silvia will be "Shiruvia" (シルヴィア)
for Q, we replace it with "Ku" letter + little vowel, e.g Qantas will be "Kantasu" (クァンタス)
For X, we replace it with "Kusu" (クス), e.g Alex will be "Arekusu" (アレクス)
Additional Information
For Ch (like Channel) replace it with "Chi" letter + little "ya"/"yu"/"yo" or little vowels (depends on how you spell it)
e.g. Channel will be "Channeru" (チャンネル)or Chester will be "Chesutaa" (チェスター)
For Ch (like Michael) replace it with "K" letter, e.g. Michael will be "Mikaeru" (ミカエル)
For name with the last letter "R", replace it with long symbol "ー”
e.g Chester will be "Chesutaa" (チェスター)
For consonant (except T and D), you give them "U" (for T and D, give "O")
e.g Tom will be "Tomu" (トム)or Red will be "Reddo" (レッド)
For double consonant, put little "tsu" before the letter that has double.
For Sch, or Sh, just replace it with "Shi" + little "ya"/"yu"/"yo" or little vowel
e.g. Schumacher will be "Shumakaa" (シュマカー)
For Ti (like Tiara), replace it with "Te" + little i . e.g. Tiara (ティアラ)
For Ck (like Jack), replace it with little "tsu" + "Ku". e.g Jack (ジャック)
For C (like Ibrahimovic), replace it with little "tsu" + "Chi". e.g. Ibrahimovic (イブラヒモヴィッチ)
If you have any question, feel free to ask