Sentence:  "R. Jeeves:" In my experience, ladies who spell Gladys with a W are seldom noted for their reliability, sir. It gives them romantic notions./ "B.W. Wooster:" With a W, Jeeves? No, no, no, no. You spell it with a G./ "R. Jeeves:" If I might draw your attention to the signature on the portrait, sir./ "B.W. Wooster:" Good Lord! G-W?/ "R. Jeeves:" I blame Alfred Lord Tennyson and his "Idylls of the King". It also accounts for Kathryn, Ysabel, and <WSD>Ethyl</WSD>, all spelt with a Y, but Gwladys is a particularly virulent form, sir. 
Meaning of the word marked with <WSD> tags:  (nodot=a): a female given name.