matron of honour

noun plural matrons of honour

a married woman serving as chief attendant to a brideCompare bridesmaid, maid of honour
a married woman, usually a member of the nobility, who attends a queen or princess

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Examples from the Web for matron of honour

Historical Examples of matron of honour

And you want me to act as matron-of-honour at that very informal little wedding.
A Woman of the World
Ella Wheeler Wilcox