Oscar Wilde: significance of "Markby"?

Just curious after watching a BBC production of “Lady Windemere’s Fan” what if any significance the name “Markby” had for Oscar Wilde. There’s a Markby named but not shown in LWF (I think it was a “Lord Markby” but I’d have to double-check) and in “The Importance of Being Earnest” the firm of Markby, Markby and Markby is named as Cecily’s solicitors. I checked my Wilde biographies but couldn’t find any mention of the name. Is there any significance to the name or did Wilde just like the sound of it or what?