Stevenage have made a third signing of the January transfer window - bringing in some competition for Dan Butler at left-back.
Nesta Guinness-Walker will be at the Lamex for the remainder of the season after signing on loan from Reading.
The 24-year-old, grandson of Sir Alec Guinness, started his career in the academies of Chelsea and Tottenham Hotspur and after a brief spell with Metropolitan Police in non-league, he signed for AFC Wimbledon before joining Reading in 2022.
Boro manager Steve Evans said: "We are delighted to get Nesta into the Stevenage dressing room. He is a young man with a fantastic attitude and great ability.
"He can play anywhere down the left-hand side of the pitch, adding a balance we have needed for some time."
Guinness-Walker follows MK Dons goalkeeper Craig McGillivray and striker Vadaine Oliver from Bradford City as their other winter signings.
Comments: Our rules
We want our comments to be a lively and valuable part of our community - a place where readers can debate and engage with the most important local issues. The ability to comment on our stories is a privilege, not a right, however, and that privilege may be withdrawn if it is abused or misused.
Please report any comments that break our rules.
Read the rules here