Great Work!

You hit a home run with אלכסה ! That is just how Alexa is written/translitterated in modern Hebrew.

Here are two ways that name Elizabeth can be written in Modern Hebrew:

אליזבת

יליזבטה

And, Lisa can be written like this  

ליסה

Bethany isn't Hebrew it actually is from Aramaic and it's really two words rather than a compound word that it appears as in the GNT.

Anyway Great Work!