Returning text from a cell in one column dependant on the text in cells two other columns

For example..... Column A contains Last Names, Column B contains First Names and Column C contains Full Names.


0------A-------------------B---------------------C
1
2
3---Last Name----------First Name------------Full Name
4----Smith----------------Bob--------------Mr. Bob Smith
5-----Doe----------------John--------------Mr. John Doe
6-----Doe----------------Jane--------------Mrs. Jane Doe


etc.

On the sheet, I want to be able to type in cell A1 the 1st name, and in B1 the second name, and for their full name to appear in Cell C1. I have around 100 people on my sheet so beingable to type in their name at the top and have their full name appear in C1 will be very helpful. Several Clients are married (hence the John & Jane Doe example) and I want to be able to search for just one of the couple.

I have tried formulas such as multiple VLOOKUPs within an IF statement but I probably didnt put those in correctly.

PS. Sorry about all the lines, didn't know how to make it look like a table.

Can anybody help?

Cheers in advance.