I need a place to find the oldest meaning of each of the hebrew alphabet?

Answer 1

Nobody knows that..

Answer 2

The Hebrew alephbet was developed from the Phoenician alphabet which ultimately goes back to the Proto-Canaanite alphabet:
http://en.wikipedia.org/wiki/Proto-Canaanite

Here's a table comparing Proto-Canaanite, Phoenician and Greek (developed from Phoenician) alphabets:
http://www.crystalinks.com/phoenician.html

Here's a good explanation of the meanings of the Hebrew letters (most of which very similar ibn form and meaning to the Proto-Canaanite letters:
http://www.abarim-publications.com/Arie/HebrewAlphabetMeaning.html

Answer 3

You mean the Hebrew letters?

Aleph [א]- ox ("aluph")
Bet [ב]- house ("bayit")
Gimel [ג]- camel ("gamal")
Dalet [ד]- door("delet")
Heh [ה]- unknown, might be "he" ("hu")
Vav [ו]- hook ("vav")
Zayin [ז]- weapon ("zayin")
Chet [ח]- unknown, might be "yard" ("chatzer")
Tet [ט]- unknown, might be "bending" ("hataya")
Yud [י]- hand ("yad")
Kaf [כ]- palm ("kaf")
Lamed [ל]- shepherds staff ("malmad")
Mem [מ]- water ("mayim")
Nun [נ]- fish ("nun")
Samech [ס]- fishbone (in old Hebrew: "shemech")
Ayin [ע]- eye ("ayin")
Peh [פ]- mouth ("peh")
Tzadi [צ]- (anatomy): temple ("tzada")
Kuf [ק]- unknown
Reish [ר]- head ("rosh")
Shin [ש]- tooth ("shen")
Thav [ת]- mark; sign ("thav")