William McGonagall
People still remember McGonagall's poems today and continue to make fun of them.  The comedian Spike Milligan had a character called McGoonagall in The Goon Show.  One episode of The Muppet Show had a character called Angus McGonagle.  In the Harry Potter books, author J.K. Rowling chose the surname of the Professor of Transfiguration, Minerva McGonagall, because she had heard of McGonagall and loved the name.