The Collaborative International Dictionary
Alferes
Alferes \Al*fe"res\, n. [Sp., fr. Ar. al-f[=a]rs knight.]
An ensign; a standard bearer. [Obs.]
--J. Fletcher.
Wiktionary
alferes
n. (context obsolete English) An ensign; a standard-bearer.
Wikipedia
Alféres
Alféres was the Old Spanish and Portuguese equivalent of the modern Spanish word for the rank of alférez or ensign.