Macarius Simeomo or Simeomus, born Jean-Baptiste (1616–1676) was the 44th abbot of St. Michael's Abbey, Antwerp.
He was educated at the Jesuit college in Antwerp and on 2 February 1634 was professed at St Michael's Abbey, taking the religious name Macarius.
He studied philosophy and theology, spending three years at the Premonstratensian College, Leuven.
[1] In 1652, Simeomo preached the funeral sermon for Abbot Johannes Chrysostomus vander Sterre.
He provided the Bollandists with documentation and received the dedication of the last volumes of March (1667) and April (1675).