🔼The name Jaala in the Bible
The names Jaala and Jaalah are different, but not so different that they should be regarded as two completely different names. In this case, the letters he and aleph are both vowels and sound alike. Hence these two letters, when they represent vowels, have the tendency to swap, without altering the meaning of the word. Something similar happens with the name Ezra / Ezrah.
The name יעלא (Jaala) occurs in the Book of Nehemiah, where it is assigned to a family-head of temple servants, who descended from the temple servants of Solomon's time (Nehemiah 7:8). The same list of names occurs in Ezra's account, but now this man is called יעלה (Jaalah — Ezra 2:56).
🔼Etymology of the name Jaala
Both versions of this name come from the root group יעל (ya'al I & II):
For a meaning of the name Jaala NOBSE Study Bible Name List reads Wild She-Goat. Jones' Dictionary of Old Testament Proper Names suggests Ibex or Mountain Goat.
It's curious that the only male who was named after this root, carries the female version of it, while the only female (Jael) has the masculine version. Still, many masculine names are feminine nouns and vice versa.