WikiTree will treat everything in the Last Name At Birth (LNAB) field as one name which is important to remember for searches: Hill Paullier becomes Hill_Paullier and a search for Hill alone will not find the profile. The outcome of previous discussions of this issue seems to be to enter the compound last name: LNAB for the male: Hill Paullier, for the married female: Hill Paullier, Current Last Name (CLN) Hill de Smith.