Iah

The claim has often been made that Allah is a moon god, with the proponent of this theory's speaking of Al-Lah, with Lah's supposedly having been the Egyptian moon god. Some very good Islam critics have parroted this claim who really should have distinguished between the upper case 'i' and the lower case 'l'. Let's look at the Egyptian.

Iah (Egyptian: jꜥḥ, Copticⲟⲟϩ) is a lunar deity in ancient Egyptian religion. The word jꜥḥ simply means "Moon". It is also transcribed as Yah, Jah, or Aah. https://en.wikipedia.org/wiki/Iah

Because careless critics have used this claim, Muslims have latched on to it, claiming that Jehovah is a heathen deity. According to Wikipedia, the name of the Egyptian deity is also transcribed 'Jah', probably a result of some blockhead's seeing it as Jah, the short form of the Divine Name, as in Hallelujah. But let's look at the Hebrew.

The full form of the Divine Name is יהוה, often transliterated Yahweh. The short form is יה. If the short form were indeed the name of the Egyptian deity, we should ask ourselves whence the form יהוה, with a second syllable, came. It should be recognised that this is actually a verb, with the meaning something like 'He Causes To Become'.

Judging from the transliteration of the Egyptian word, were the Hebrew short form of the Divine Name derived from Egyptian, we might expect it to be spelled יעח. This would be Y (if the character is to be transliterated thus; see Aah above)-'Ayin (a sound common in Arabic)-CH (guttural 'h'). The Muslim should ask himself why the short form of the Name is not spelled and pronounced thus.

Now, if the Muslim wishes to claim that Jah/Jehovah is the name of a heathen deity, he should ask himself why some of the quranic characters bear the short form Jah in their names. My post: A Brief Note on the Names Ilyas, Isa, Yahya and Zakariyya

Regarding 'Lah', see my post Allah Al-Ilah? If Lah had a meaning, it would most likely be along the lines of 'Lofty'.