Derin S. McWilliams of Somerville, was born on April 10, 1981 and died on May 29, 2012. He was the beloved husband of Jill Rockwell McWilliams and caring stepfather to Valerie and Ava. Derin is survived by his parents Jan and Laurence McWilliams, sisters Lauren McWilliams and Jenessa and her husband Geoff Dailey, as well as three nephews, Caleb, Hunter and Sean, and various other friends and relatives including mother-in-law Sandi Kemp, father-in-law James Rockwell, sister-in-laws, Jenni and Julie, brother-in-law Brian and closest friends Kosta E., Jesse C., Devin C., Ilya M., Bukkiah G., Chris Reno., and a daughter he hoped to reunite with one day. Visiting hours in the Brown-Flaherty Funeral Home, 261 Washington Street, Union Square, Somerville on Tuesday 4-8pm. Derin was an amazing husband, father, best friend and son. There was never a moment when he couldn’t make someone laugh with his witty ways. He was an artist but wanted dearly to be a carpenter. He loved family, children and being happy. He would always sing, music made him happy. We will never forget the caring, kind, intelligent, loving man that he was and he will remain forever in our hearts and memories. Interment will be private