Prefix
The month of your birth.

January - Frosty
February - Maple
March - Sparrow
April - Splash
May - Tree
June - Stoat
July - Frog
August - Apple
September - Vine
October - Thorn
November - Stump
December - Crimson

Suffix
Last letter of your last name.
A-C  -  heart
D-F  -  spring
H-J  -  whistle
K-M  -  song
N-P  -   claw
Q-S  -  spot(s)
T-V  -  ring
W-X  -  pool
Y-Z  -  fall

I got Thornheart :)