"in whose honour" is a grammatically correct and commonly used phrase in written English.
It is typically used to indicate that something is being done or said as a tribute or sign of respect for someone. Example: The town held a parade in whose honour the brave soldiers who fought for their country were remembered and celebrated.
He married Papianilla, daughter of the Emperor Avitus in whose honour he recited at Rome on 1 January 456 a panegyric in verse.
Attributing his success to the patronage of the goddess Ishtar, in whose honour Agade was erected, Sargon of Akkad became the first great empire builder.
Very important in this period was Surya, the sun god, in whose honour temples were built, though in modern times he is little regarded by most Hindus.
She became as renowned a Broadway star and teacher as her great heroines, Katharine Cornell (in whose honour she named her daughter, Katharine, Helen Hayess and Uta Hagen.
Bede explains that the lunar month of Eosturmonath "was once called after a goddess... named Eostre, in whose honour feasts were celebrated".
At the same time, however, Cecil had been reduced by the same deadly illness that claimed the life of Bobby Frankel, a trainer of equivalent standing in the United States, in whose honour the colt had been named.
Lee sets her story squarely against racism, but she was raised in a profoundly racist society, and that is the world whose honour she set out to defend.
Pembroke, whose honour had been affronted, appealed for justice both to Gaveston's brother-in-law Gloucester and to the University of Oxford, but to no avail.
It was the palate-sating, savoury essence that Auguste Escoffier (in whose etymological honour we "scoff" our food) had used to revolutionise French cuisine a few decades before Ikeda's discovery.
Acting in whose interest?
