I have no connection to this family.Saw your query and did some searching. This is what I have found:
"Queen For A Day" was America's forerunner of a "reality" program with big prize giveaways to the winner. First on radio hosted by Jack Bailey from 1945-1957, then onto television from 1956-64 and 1969-70. The Hollywood Doll Company, in business from 1941-60, manufactured and supplied more dolls to the market at the time than any other company. Their dolls range from 5-8" in height, can be painted bisque, composition, hard plastic or vinyl. They made many different series of dolls and were the only maker authorized to produce Queen For A Day dolls. Your doll has dark hair but they also made the doll with blonde and red hair. It is good that it was kept in it's box as the original packaging adds to the value. Depending on where you would buy it, antique market, fair, toy or doll dealer, or auction the price can vary from $45. to over $100. Jack's signature closing for the show was "Make every woman a queen, for every single day!"
You can learn more about the Hollywood Doll Company by googling for it.
Without having a birth date, I cannot find more about Dominic, sorry.
Regards, Susan Nass Random Acts of Genealogical Kindness