Hanniah \ha(n)-niah\ as a girl's name is a variant of Hania (Hebrew, Arabic), and the meaning of Hanniah is "a place to rest; to be happy".
The baby name Hanniah sounds like Haniah, Hannah, Hannyah, Hanniyah and Hannia. Other similar baby names are Lannah, Haninah, Hanyah, Dannia, Dannah, Fannia, Hannya, Hanniya, Haniyah, Hannie, Hanna, Hanah, Jannah and Sannah.