Resemblance
You see a triceratops standing in front of a full moon and you can't help but see a really strong resemblance. The triceratops has that round frill thing behind its horns and it looks just like the round full moon. Who knew that a triceratops would resemble the moon!
Look at the triceratops. Now look at the moon. See the resemblance? Uncanny, don't you think?
しょう
あやか
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The first person to see this resemblance was the Shougun (しょう). That's why he decided to put a triceratops head with the moon behind it on his mon (family crest). Now he's known as the full moon dinosaur shogun, and he's very famous.
Imagine being the Shougun and seeing the resemblance between a triceratops and the moon for the first time. You'd put that on all your stuff too, if you were him.