A grandson of the late Maryland Del. Hattie N. Harrison (D-Baltimore) has been charged with stealing more than $17,600 from her campaign, the Office of the Maryland State Prosecutor announced Monday.

Prosecutors said that Philip Harrison II wrote numerous unauthorized checks from the campaign account to himself and his girlfriend between 2006 and 2010 and also used campaign funds to pay Comcast and Verizon bills.

For part of that period, Philip Harrison was treasurer of his grandmother’s campaign. Some of the latter checks were written after he no longer held that position and included forged signatures of the current campaign treasurer, prosecutors said.

Philip Harrison, a Salisbury resident, could not immediately be reached for comment.

Hattie Harrison, who died last year at age 84, had been the longest-serving member of the House of Delegates. She first became a member of the chamber in 1973.

In addition to felony theft, Philip Harrison was charged in Anne Arundel Circuit Court with fraudulent misappropriation of campaign funds and a related election-law violation. He faces up to 21 years in prison and $40,000 in fines, prosecutors said.