I am assuming
that no one objects that in the verse below that YHVH  and Joshua 
Joshua 1:1 And it came about after the
death of Moses the servant of Jehovah  that Jehovah 
proceeded to say to Joshua  the son of Nun, the minister of Moses:
Yehoshua - Original Word: יְהוֹשׁ֫וּעַ - Jehoshua (short form:
No one questions the original Hebrew word being translated in English as Yehoshua
and even uses the J instead of Y as in Jehoshua.
Likewise in the follow verse  for Original Word:
יְהוֹשָׁפָט – Yehoshaphat - Jehoshaphat
17:1 And Je·hosh´a·phat  his son began to reign in place of him and to make his position
strong over Israel.
So far we have
an example of two names in Hebrew יְהוֹשׁ֫וּעַ and יְהוֹשָׁפָט that no one has a problem with these names in English be
tranlatated as Jehoshua and Jehoshaphat.
Now a step further, that was Hebrew to
English now Greek to English:
Original Word: Ἰησοῦς –  Iésous - Joshua
4:8 For if Joshua  had led them into a place of rest, God would
not afterward have spoken of another day.
Original Word: Ἰωσαφάτ, ὁ
-  Iósaphat - Jehoshaphat
Matthew 1:8 A´sa
became father to Je·hosh´a·phat ; Je·hosh´a·phat became father to
Je·ho´ram; Je·ho´ram became father to Uz·zi´ah;
Again no one
seems to question the correctness of the English names Jehoshaphat
and Jehoshua (short form: Joshua) from Hebrew יְהוֹשָׁפָט and יְהוֹשׁ֫וּעַ.
So with that said take note of the vowels e & o.
Now bouncing along:
Original Word: יִרְמְיָה –  Yirmeyah
No one questions the correctness of this
English spelling of this Hebrew name.
Notice the vowel, a.
Exodus 15:2 My strength and my might is Jah ,
since he serves for my salvation. This is my God, and I shall laud him; my
father’s God, and I shall raise him on high.
Original Word: יָהּ –  Yah – Jah
No one questions the correctness of
the use of Jah and again notice the vowel, a.
So we have the vowels e,o
& a. (BTW, the whole using the vowels of ‘Adoni’ is nosense. There
isn’t even an e in it.)
Now with those vowels taken from names that
are not questioned and names that are said to mean:
Jehoshaphat “YHVH Is Judge” and
Jehoshua “YHVH Is Salvation”
And a name (Jah) that is said to be a shortened form of YHVH, how could
anyone not think that it would be appropriate that those vowels not be used in
the YHVH and that the end result of this name we would see the short form Jah
and see part of the name that is in Jehoshaphat and Jehoshua.
JHVH + E,O,A