Purpose or bright
Niajah is a modern American creation, likely blending the Swahili name Nia, meaning 'purpose', with the suffix -jah, often used in African American naming traditions to evoke a spiritual or rhythmic quality. It is frequently associated with the principle of Nia from Kwanzaa.
Less common today
Niajah isn't in the latest US Top 1000. It last peaked at #6,439 in 2005.
US births per 5-year period, 1990βpresent (SSA data).