Likely a modern variation of Amaya, meaning night rain.
Amiayah is a contemporary American spelling of the name Amaya. While its exact etymology is debated, it is most frequently linked to the Basque name meaning 'the end' or the Japanese name meaning 'night rain'. This specific spelling adds a rhythmic, multi-syllabic flair common in modern creative naming.
Less common today
Amiayah isn't in the latest US Top 1000. It last peaked at #11,576 in 2015.
US births per 5-year period, 1990βpresent (SSA data).