Proto-Sinaitic was directionless. Phoenician and Archaic Greek was written right to left. I think that it shifted when Archaic Latin came around. What you are seeing is more the direction of the writing than handedness.

If you don't know already, you might have your mind blown by the fact that Ancient Egyptian(en.wikipedia.org) hieroglyphs map to our alphabet(files.catbox.moe) nearly 1-to-1.

Also, the A sound has been the conventional ending for female names since at least those times.

I was actually talking about this the other day with the Fiancee. I speculated that one reason the West advanced more quickly was the efficiency of the written language. Like you look at the Chinese

"And see, this symbol is a forest and there's a little cabin off to the side, with a bear shitting in the woods to the right of it"

"Oh cool. What does that mean?"

"4"

For example, one thing a lot of people don't realize is the numeral system is different from country to country, not just "0, 1, 2". Here are some of the historical Chinese numerals https://en.m.wikipedia.org/wiki/Chinese_numerals#Historical_use_of_numerals_in_China

Imagine trying to do business by hand with these. All of the Western numbers are one stroke. Simple

Here's a number chart similar to OP's(cdnapisec.kaltura.com) (but not exhaustive). Even Roman Numerals were probably more efficient at the time, enough to deal with smaller numbers anyways (which was sufficient for the vast majority of use cases).

That's petty deep actually.

Julius ceaser

Oh burn!

It was I in Etruscan and Phonescian, where it was a /ts/ sound. The greeks vocalized it into our /z/ sound and made it Zeta, and that's how it it made it into Latin.

(If you don't know what I mean by vocalizing it, make a "tssss" sound, and then shift immediately into a "zzzzz" sound. Your mouth doesn't change shape, you just engage your vocal cords.)

Somewhere I have a much more complete graph, I'll post it eventually.