Hi Christine ...
The 1841 census records Letitia HENNERD (surname a little difficult to read, but I think it definitely begins with an "H"!) working as a FS (female servant) in the household of Henry DAWS. I therefore think you can discount DAWS as a possible alternate surname. It also shows that she was born outside the county (ie. not in Oxfordshire).
Also of interest - in the same house there's a ten-year-old William BATES!