[en] A₂MnB'O₆ (A=Ca, Sr; B=Sb, Ta) double perovskites have been synthesized and their structural and magnetic properties have been investigated. Rietveld refinement of the powder X-ray diffraction data for Sr₂MnSbO₆ indicated significant ordering of Mn and Sb at the B-site while all other phases showed mostly a random distribution of the B-site cations. X-ray absorption spectroscopic data established the presence of Mn in the 3+ and Sb/Ta in the 5+ oxidation states in all the phases. Magnetic susceptibility data indicated ferromagnetic correlations for all the A₂MnB'O₆ phases with Weiss temperatures varying from 64 to 107 K. - Graphical abstract: The M vs. H plots for the ordered Sr₂MnSbO₆. The magnetization data at 5 K shows hysteresis loop (inset) with a Brillouin-like curvature indicating significant ferromagnetic correlations in the system