Euan and Patrick Brown made it a Brown brothers one-two in the Hackey Marshes 5km parkrun on Saturday.
Beating his brother into second place by just over a second, Euan finished first in a time of 15.43.
Patrick came in second in 16.51, with Ciaran Canavan also posted a top-ten finish, crossing the line in sixth with a time of 17.24.
In the Wanstead Flats 5km parkrun, David Baldwin finished in 19.18 to claim fourth.
There were also top-ten places for Joseph Browne, seventh in 19.33, and Regis Martin, ninth in 19.45.
Dan Spinks completed the Kent Roadrunner Marthan in 4.06.39, whilst in the Regents Park 10km on Sunday, Rosin Archer (44.45) and George Georgiou (53.26) ran personal bests.