Eugene - You've got it. The official policy is that the "Last Name at Birth" (or LNAB) should be the name they were born with. Barring clerical sloppiness, birth or baptism records support the LNAB. If the family subsequently moved and adopted a different spelling/styling of the surname, that could be "Other Last Names" or "Current Last Name" (CLN). CLN should be the name used by the person at the end of their life. Frequently, marriage records will support a woman's CLN. Barring incorrect information provided, clerical sloppiness & tombstone errors, death certificates and cemetery records can support the CLN of both men and women.