I also like both [name]Maya[/name] and [name]Maia[/name], but not [name]Myah[/name].
If it makes any difference to you the [name]Maya[/name] spelling is much more common than [name]Maia[/name].
According to behindthename.com there are three definitions of [name]Maia[/name]:
[name]MAIA[/name] (1)
Gender: Feminine
Usage: Greek Mythology, [name]Roman[/name] Mythology
Other Scripts: ??? (Ancient Greek)
Pronounced: [name]MAY[/name]-? (English), MIE-? (English)]
Meaning unknown. In Greek and [name]Roman[/name] mythology she was the eldest of the Pleiades, the group of seven stars in the constellation [name]Taurus[/name], who were the daughters of [name]Atlas[/name] and Pleione. Her son by [name]Zeus[/name] was [name]Hermes[/name].
[name]MAIA[/name] (2)
Gender: Feminine
Usage: [name]Roman[/name] Mythology
Pronounced: [name]MAY[/name]-? (English), MIE-? (English)
Means “great” in Latin. This was the name of a [name]Roman[/name] goddess of spring, the wife of [name]Vulcan[/name]. The month of [name]May[/name] is named for her.
[name]MAIA[/name] (3)
Gender: Feminine
Usage: Basque
Basque form of [name]MARY[/name]
There are also three forms of [name]Maya[/name]:
[name]MAYA[/name] (1)
Gender: Feminine
Usage: [name]Indian[/name], Hindu Mythology
Other Scripts: ??? (Hindi, Sanskrit)
Means “illusion” in Sanskrit. In Buddhist tradition this is the name of the mother of Siddhartha Gautama (the Buddha). This is also another name of the Hindu goddess Durga.
[name]MAYA[/name] (2)
Gender: Feminine
Usage: English
Pronounced: [name]MAY[/name]-?, MIE-? [key]
Variant of [name]MAIA[/name] (1). This name can also be given in reference to the [name]Maya[/name] peoples, a Native American culture who built a great civilization in southern Mexico and Latin [name]America[/name].
[name]MAYA[/name] (3)
Gender: Feminine
Usage: Hebrew
Other Scripts: ??? (Hebrew)
Derived from Hebrew ??? (mayim) “water”.
Many different and interesting meanings! Maybe they will help you decide. (Not to make matters worse, but there’s also the Scandinavian [name]Maja[/name] and the Russian [name]Maiya[/name]!)
Good luck!