A sophisticated name for a housekeeper could be "domestic manager" or "household steward." These titles convey a sense of professionalism and responsibility, emphasizing the managerial aspects of the role while maintaining a refined connotation. Additionally, "residential concierge" can also suggest a higher level of service and attentiveness in managing a household.
Fred's housekeeper's name in "A Christmas Carol" was Mrs. Griggs.
Mr. Jaggers' housekeeper is Molly.
Darcy's housekeeper was Mrs. Reynolds.
Lupita
ALICE
Mr. Jaggers' housekeeper in Great Expectations was named Molly.
Jack Starbright
Rosalita
Mrs Dilber
Mrs. Hudson
If Cecilia had a housekeeper, her name has long since been lost to history. I can find no reference that even mentions anything about Cecilia's domestic staff.
The housekeeper in the original Brady bunch series was called Alice (played by Ann B. David)