The terms tended to merge because of their similar pronunciations and meanings.
Although Koreans have nicknames, these usually come from their personal characteristics like appearance, a physical defect, or the word has similar pronunciation with his name.
Unrelated names with similar pronunciations occur in other cultures.
This is to ensure similar pronunciation across major languages:
It may also merely have been the result of writing the wrong character with a similar pronunciation.
The number 38 was chosen because of the similar pronunciation to "30-A".
Most of these pairs have a similar pronunciation, only varying significantly in their duration.
This is done by employing Chinese characters with similar pronunciations.
A glyph could be used as a rebus to represent a different word with the same sound or similar pronunciation.
This is reinforced by the similar pronunciation of the word for eight as "bā."