I think I found something really obscure here: during the "Martha" scene in Batman v Superman (2016), the name "Lara" - Superman's birth mother - appears to be graffitied on a column
Superman (Clark Kent) | DC Database | Fandom
DStv - What's Superman's real name (name given to him by his parents on his home planet - Krypton)? a) Clark Kent b) Zod c) Jor-El d) Kal-El Catch Superman in Man
Rex Parker Does the NYT Crossword Puzzle: Superman's birth name / MON 4-3-17 / __ Philippe (Swiss watchmaker) / __-CIO / "That sounds good - NOT!" / Cheri formerly of S.N.L.
A Superman comic from 1960 predicted Back to the Future - Polygon
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What is Superman's real name? - Quora
Superman Birth Name Crossword Clue
Kal-El | The Superman Wiki | Fandom
What does Superman's real name of Kal-El mean? - Quora
Superman's Kryptonian Name Predicted His Origin & Powers
Superman - Wikipedia
How Superman Became a Christ-Like Figure in American Culture ‹ Literary Hub
Kal-El (All-Star Superman) | DC Database | Fandom
Man of Steel Activity
Superman, birth name Kal-El and adopted name Clark Kent, is Earth's premiere superhero and the stalwart protector o… | Superman art, Superman vs the elite, Superman
Superman | Darian's DC Extended Universe Wiki | Fandom
10 things that you might not know about Superman | My Trivial Pursuits