- Leonard Cooper is the namesake of Leonard Hofstadter (Sheldon's best friend) and Leonard Nimoy (a one of Sheldon's idols).
- According to a brief comment made by Sheldon in the Young Sheldon Season 1 finale narration, he and Amy have CHILDREN in the future. This means that Leonard Cooper has at least one sibling.
- In the third season of Young Sheldon, it is mentioned that Sheldon has made a contract with his children, which could include Leonard.
- According to Sheldon, he and his sister Missy had the best graduation party, until the one they had for Leonard Cooper after his graduation.
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