Greatly beloved; very dear. Sometimes used substantively.
The Century Dictionary (Public Domain)
Use "well-beloved" in a sentence
"Of course, for a bookish person, there is no place like home when the bookshelf is comfortably stocked, and you are blessed with a soft chair, a warm fire, a bright lamp over your shoulder, a cool drink at your elbow, and a few uninterrupted hours to open the covers of some well-beloved book of gold, and soar to distant realms whose stars are not like ours, far from the fields we know."
"The letters are from the Queen explaining in pitiless detail why she had picked her "right, trusty and well-beloved counsellor John Leslie Prescott" for the job."
"At least, this format is well-beloved in fanfiction, and I think an audience trained on serial TV with long character arcs may be more receptive to it."