- In the book "Alfred Hitchcock: A Life in Darkness and Light" by Patrick McGilligan, it was noted that Alfred Hitchcock thought that Lion was an "awful old man".
- He played Marquis Li Chung in two of adaptations of the play "The Chinese Puzzle", which he co-wrote with Frances Barclay: The Chinese Puzzle (1919) and The Chinese Puzzle (1932).
- Father: Henry Solomon Lion; Mother: Mathilde Marks.
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