this is totaly not a good website to look mon and the answer
is........lady-in-waiting
View page
A lady in waiting was a companion and helper to a lady. The lady
in waiting was a member of the nobility, but waited on or assisted
a more important, usually older, lady.
See the link below.
View page
Lady in Waiting - album - was created in 1976.
View page
Lady-in-waiting
View page
The compound noun 'lady in waiting' is the singular form. The plural form is ladies in waiting.