Chase's twin brother ref

So I don't have a name for this lil dude yet, but I have some vague ideas about his personality!!! Let me know what you think or maybe give me suggestions for him and his name C:
Name: ---- Calvin
Age: 14
Height: Short. 4' 9"
Weight: Average. 120 ish
Info: He is full of life and happiness, but manages to stay down to earth and humble. He tends to not think about things and he likes to go with what his heart tells him (this sometimes has poor results). In hot weather, he sports a ripped blue t-shirt, a blue bandanna, green dyed shorts, and yellow rain boots, while in cold weather he has green dyed pants, and a grey hoodie/bandanna. He also has port wine stain on his face, right arm, and some of his left leg. 
His hobbies include exploring, studying nature, collecting things (rocks, seashells, leaves- to study), and sometimes he likes to volunteer to pick up litter and garbage around his area. He also enjoys stargazing with his sister. 

So there you have it folks. Any suggestions for names/ or any critiques are appreaciated C:

art and character (c) by me