The name Know Father in Chinese / Japanese...

知子莫若父 can be translated as “No one knows a son better than his father.”

This idiom is based on the idea that after spending many years together, family members know everything about each other. Better than anyone else, a father knows the qualities and shortcomings of his son.

If you are looking for something about “father and son,” this is probably the best selection.

While this is the original proverb (very old), others have been composed about various combinations of mothers, sons, daughters, and fathers. Let me know if you need a custom version.

鼈 refers to a species of turtle.

鼈 is Trionyx Sinensis.

鼈 refers to different turtles in different languages. See individual language notes below:

Japanese: 鼈 means “snapping turtle” or “mud turtle.” But rarely used as a single Kanji like this in Japanese.

Chinese: 鼈 means soft-shelled turtle. A specific species, Trionyx Sinensis is native to Asia.
In China, this species is related to the “wang ba,” a soft-shelled turtle sometimes known in English as a banjo turtle (due to its long neck, and general shape). Unfortunately, there is a word, “wang ba dan” which means the egg of this species of turtle. That term has come to mean “bastard” in Chinese (a turtle hatches from an abandoned egg, and does not know who his mother or father is). 鼈 is not a good selection for a wall scroll if your audience is Chinese.

In Korean, this character can be pronounced (though most Koreans would have to look it up in a dictionary). It has not been in common use in Korea for at least a few hundred years.

General notes: You may notice that the bottom half of this character is the same as some other turtle-related titles. That bottom half is actually an ancient character that means “toad.” Though not seen in this way today, most turtle-related characters hold the meaning of “a toad with a shell” in their ancient origin. That toad character is rarely used alone anymore but you can see what it looks like in the image to the right.