Honorifics should be capitalized when they appear right before a name. Mr. and Mrs. are, of course, capitalized before a name. "Mrs.," which stems from the title "Mistress," is also capitalized before a name and is less regularly used than it was some decades ago. Other honorifics that appear right before a name include Dr. , and Sir. When writing about people, it is customary to use their first name with their family name after it, like this: "John Jones (né John Davies)" or simply "John Jones." You can write about him as "John Davies Jones" or even "Davies Jones." The only requirement is that you include his family name on all references to him. In general usage, given names are not capitalized unless they are proper nouns. Thus, the name "Mary" would not be capitalized, while "Mary Jane" would be. Family names, however, are always capitalized regardless of whether they are proper nouns or not. For example, "Mary Jane's father owns a restaurant" would be correct grammar if she had been given the last name "Jones." Finally, titles are always capitalized. A doctor is called "Dr. Smith", for example. Even common words such as "of" and "the" require capitalization when used as titles. So "Mr.