Abaddon's name is Avaddon. It is spelled אֲבַדּוֹן
In Revelation chapter 9 verse 11 it says, 'Their king is the Prince of the bottomless pit whose namein Hebrew is ABADDON, and in Greek, APOLLYON.' This translates to "The Destroyer" in English. This was taken from The Living Bible translation.
No, as it depends on the version of the Bible you are referring to - there are dozens of listings in the NIV and NKJV.Just like there are many Sacred Names and terms for God, there are similarly differing names and terms for Satan - the evil one and these as examples :Revelation 9:11New King James Version (NKJV) 11 And they had as king over them the angel of the bottomless pit, whose name in Hebrew is Abaddon, but in Greek he has the name Apollyon.
Baraq (ברק) is the Hebrew word for lightning, but there is no such word in Greek.Note: based on the spelling in the question, you're talking about Barack Obama, whose name is not Baraq in Hebrew. It is Baruch (ברוך) which means "blessed".
Helen is a Greek name. It has no equivalent in Hebrew. Helen is the English form of the Greek name 'Ελενη (Helene), probably from Greek 'ελενη (helene) "torch" or "corposant", or possibly related to σεληνη (selene) "moon". In Greek mythology Helen was the daughter of Zeus and Leda, whose kidnapping by Paris was the cause of the Trojan War.
Jewish people
one of the greatest Greek geographer whose maps influenced columbus
Pisteuo is a Greek word whose meaning is to trust.
selenium is the element whose name is moon in Greek
The following names of Hebrew letters are spelled with 4 letters when written in English:alefchetayinreshshin
Ruth
The naming being weird is an issue of perspective. Many of the names of the Biblical books are derived from the names of the characters in the Bible, whose names were in Ancient Hebrew, or from the early Greek or Latin translations of the books' names.
As far as I know, there is no Greek god whose name begins with W.