From the Wiki on Ann Davis, coincidentally Ann Bradford Davis:
Ann Bradford Davis (May 5, 1926 – June 1, 2014) was an American television actress.
Davis achieved prominence for her role in the NBC situation comedy, The Bob Cummings Show (1955–1959) for which she twice won the Emmy Award for Outstanding Supporting Actress in a Comedy Series, but she was best known for playing the part of Alice Nelson, the housekeeper in ABC's The Brady Bunch series (1969–1974).
I had not realized that the original Brady Bunch show ran only 5 years but, of course, it's been in reruns ever since - 40 years now.
Here's Time's James Poniewozik's reaction to Ann Davis's death:
Good bye to the lovely Ann B. Davis, a.k.a. Alice of the Brady Bunch
From YouTube: Far Out Alice