Yes, Chole and Khole are probably just typographical errors for
Chloe and
Khloe. "L" and "O" are next to each other on the typical English language keyboard and so it would be a particularly easy error to make.
There are some such errors that seem to be particularly common. "Joesph" for
Joseph turns up a lot, probably again because "E" and "S" are adjacent on the keyboard.