[...JORLYN is a combination name. It is probably from the Hebrew YARA, meaning TO TEACH, TO INSTRUCT or TO FIRE, TO SHOOT; or from the Hebrew YOREH which is the name of the first rain of the season. And
LYNN, a variant spelling of LINN, which is from the Welsh meaning WATERFALL,
LAKE.
Variant spellings - JORLIN - JARLIN - JARLYN...]
the above text is taken from the website:
http://www.hebrewbabynames.com/item.cfm?itemid=1948
Your name Yarlyn is a variant of Jorlyn (note: Yara and Yoreh start with the letter 'y' too)