Final answer:
The Connecticut-born jeweler whose last name is seen on the coveted blue boxes is Tiffany & Co., founded by the father of Louis Comfort Tiffany, an influential artist and interior designer.
Step-by-step explanation:
The last name of the Connecticut-born jeweler seen on coveted blue boxes is Tiffany & Co.. The company was founded by the father of Louis Comfort Tiffany, who, though best known for his work with glass, came from the lineage that began with jewelry making. Louis Comfort Tiffany, born in 1848, eventually focused on interior design and decorative arts. Some of his most notable works include stained glass windows and lamps that employed innovative techniques to create unique effects, such as marbleized and iridescent finishes, and confetti-like appearances using small glass pieces. Though Louis Comfort Tiffany started his career as a painter, he expanded his scope by following in the footsteps of his father's company, Tiffany & Co., ultimately becoming one of America's most well-known artists in his own right.