Teuku
Historically Teuku is a title or honorific in Aceh that became a fixed part of some personal names; it denotes noble lineage or chieftain status.
Teuku is specific to Aceh (northern Sumatra, Indonesia) and is found in Malay-Acehnese historical and genealogical records.
As a cultural title it is primarily Acehnese; outside Aceh it may appear in diaspora communities but is not a general Islamic title.
Teuku is a regional Malay/Acehnese honorific used by Muslim communities in Aceh, but its function is social/lineage-based rather than a religious office referenced in scripture.
Acehnese female honorifics differ (for example certain families use other lineage markers); Teuku is specifically a male/title element.