The title the Fair Maiden/Squire is unlocked by doing various activities at the Spring Fayre 2018.
When the last requirement is met, this message is given: Your enthusiasm for the Fayre has been noted by all. You have unlocked the title the Fair Maiden/Squire.
The title is awarded by completing a number of requirements during the Spring Fayre.
This title changes according to the language of the server on which RuneScape is played, as shown below:
||[Name] der Rummelritter / die Rummelritterin
||[Name] le damoiseau de la fête / la demoiselle de la fête
||[Name] o Donzel da Sorte / a Donzela da Sorte