Coat of arms of the U.S. bishop Arthur Leo Kennedy, Auxiliary Bishop of Boston.
Blazon: Sable, upon a cross fleuretty Or a helmet Argent; upon a chief of the second the eschewed cross and “M” of the arms of Venerable John Paul II between two open volumes of the third, edged Gules.
Motto: “UT COGNOSCANT TE”.
Reference:

www.bostoncatholic.org, PDF.
Own work
SajoR