Whether modern or ancient, the meaning remains the same - A letter can be it's 'symbol' or it's 'meaning' (or it's number). The meanings as presented are a bit terse, but here is my understanding:
yud(arm, hand, fist) hey (look, reveal, behold) waw (tent peg, nail) hey ((look, reveal, behold)
See here
Thanks for the article. Very interesting. I am matching what was posited there with the really ancient pictographs and all the possible various meanings.