Quick answer
Ahtahkakoop is a boy name meaning "star blanket".
Meaning and history
From Cree ᐊᑖᐦᑲᑯᐦᑊ (Atâhkakohp) meaning "star blanket", derived from ᐊᑖᕁ (atâhk) "star" and ᐊᑯᐦᑊ (akohp) "blanket". This was the name of an early 19th-century chief of a Plains Cree people.
Notes and context
Usage: cree