Name of titled woman in Gilbert and Sullivan originally (6)

I believe the answer is:
gladys
'name' is the definition.
(woman's name)
'titled woman in gilbert and sullivan originally' is the wordplay.
'titled woman' becomes 'lady' (I've seen this in another clue).
'in' means one lot of letters goes inside another.
'gilbert' becomes 'g' (this could be a standard abbreviation of which I'm unaware).
'and' is a charade indicator (letters next to each other).
'originally' says to take the initial letters.
The initial letter of 'sullivan' is 's'.
'g'+'s'='gs'
'lady' placed within 'gs' is 'GLADYS'.
'of' acts as a link.
Can you help me to learn more?
(Other definitions for gladys that I've seen before include "Female name" , "Girl's name" , "- Cooper, Eng. actress" , "Lady's name" , "- Knight and the Pips (Motown)" .)
