In Japanese it is called Mizuhiki and has a lot of history and significance tied to it (pun intended). This knot is ubiquitous in Japan so neither brand is copying anything other than Japanese cultural icons. For example at every wedding you will see the Mizuhiki knot which symbolizes a bond that cannot be broken. At funerals you will see another knot that can come undone that is symbolic of the spirit leaving the body.
Here is an interesting article on them >>
PingMag - The Tokyo-based magazine about “Design and Making Things” Archive Masafumi Arita: The Renaissance of Mizuhiki