John and Jacob (also rendered James) of Meniugi were two young brothers venerated in the Novgorod region of Rus'. According to the surviving account they were the children of a pious couple, Isidore and Barbara, and died in early childhood, killed by malefactors, Jacob at the age of three and John at the age of five.
Their veneration arose after their relics were discovered incorrupt later in the seventeenth century. The brothers are commemorated together on June 24, and the historical record preserved about them is brief, reflecting their standing as a local commemoration rather than a widely documented hagiographical tradition.