600 Personal Name Subject:
1st indicator: Type of personal name
0 Forename
1 Single surname
2 Multiple surname
3 Family name
2nd indicator: Source of subject heading
0 Library of Congress Subject Heading
Most common subfield codes:
a Name (surname and forename)
b Numeration (Roman numerals used in the entry element of a name)
c Titles and other words associated with the name
d Dates (of birth, death, or flourishing)
k Form subheading
q Qualification of name (fuller form)
t Title
x Topical subdivision
y Chronological subdivision
z Geographical subdivision Family name