Ok, let me preface this with - I am not legal expert, so this is not legal advice. This is advice based on game industry and marketing experience.
On computers, "Klondike Solitaire" is kind of redundant because most people who learned solitaire on PC, learned from Windows Solitaire... which is Klondike.
So, some approaches you can use are
- Go with other variations on the name, such as Canfield, Patience, Seven up, Sevens
- Use Klondike in the name but not as the name. Klondike is a card game that preceded computers by decades, if not a century. For example, Krazy Klondike or Klondike Kings would be options if they are not already taken. DO NOT add a third word that starts with K to the name
- Are you making other card games? If so, start a series like Card Game Classic: Klondike, and then the next one Card Game Classic: [nextgame], etc
There are plenty of ways around it.