According to the website
Song Facts:
"Linda" is Linda Eastman, a celebrity photographer who was married to Paul McCartney from 1969 until her death from breast cancer in 1998. The song was written by Jack Lawrence, who went on to write many classics, including "All Or Nothing At All" and "Tenderly."
Lawrence was serving in the U.S. Maritime Service in Brooklyn in 1942 when he wrote this song. On his website, he tells the story: "My attorney at the time was also a close friend whom I visited often and got to watch his children growing up. One day he said to me: 'Jack, do me a big favor. You know my wife Louise has a name song — that one popularized by Chevalier, and my daughter Laura is proud of that beautiful Mercer-Raskin song, and my son Johnny has lots of name songs he can claim. But my daughter Linda feels left out. How about writing a song especially for her?' Being a good friend, I obliged and wrote a song for five-year-old Linda."
Ka is a wheel.