What is the correct way to write this sentence dr conrads wife Jill will join him?

The correct way to write the sentence is: "Dr. Conrad's wife, Jill, will join him." This version includes appropriate punctuation, such as the period after "Dr" and commas to set off the appositive "Jill." Additionally, it uses the possessive form "Conrad's" to indicate that Jill is Dr. Conrad's wife.