How To Write Phd Holder Name . Are easy to follow, once you know them. Never use the prenomial dr and the phd postnomial together. job application letter example job application letter of interest example from jobapplicationletterexample.blogspot.com One might be a professor, the other a physician. Firstly, “p” must be in a capital case. You should engrave all your personal envelopes or labels with either dr.