Kevin Feige indicated that the use of the name "Tina Minoru" for this character was an Easter egg due to Marvel Studios having previously developed a Runaways film for a long time before it was canceled.

There is none... I am sure if you look up your name on Facebook, you will see there are more than just you...

In Season 3 they tried to connect them tho, both being experienced with the Dark Dimension, both having trained magic, I think they tried to make them relatives. That is your answer.