A Pennon

1. A thin, often triangular flag or streamer, especially as hung from the end of a lance or spear.^[1] Pennon - Wikipedia
2. (nautical) A long pointed streamer or flag on a vessel. Synonym: pennant
3. (literary, obsolete) A wing (appendage of an animal's body enabling it to fly); any of the outermost primary feathers on a wing. Synonym: pinion