Neil Innes died just before Christmas.
He wrote the music and many of the lyrics for the Monty Python TV series and films.
He also played in a number of groups, one of which -- a group of art school students -- was the Bonzo Dog Doo-Dah Band (which I remember seeing in a three-quarters empty Civi Theatre in Darlington, England, in the 1960's).
The Band was originally called the Bonzo Dog Dada Band, but no one got the reference to Dada, so it was renamed the Bonzo Dog Doo-Dah Band.
Later it became the Bonzo Dog Band.
So much for Dada.