The name reached its all-time peak in 2009 with 7 births ranking #10465. STABLE Recent data shows the name is currently stable.
Keira is generally treated as an anglicised Irish form carrying the idea of dark colouring. It feels sleek and modern while staying close to a traditional Gaelic root.
The name became more familiar internationally as Irish names travelled into mainstream English use. Its polished spelling has helped it feel contemporary without losing its Celtic connection.