Family/Related Person (Infotype 0021) 
You store the employee’s family members as well as other related persons In the Family/Related Person infotype (0021).
The standard system contains the following relation types:
Personal data
Using the employee data, the system defaults entries for the following fields:
You can change these default values as required.

Because the individual family members do not have to be recorded in the system, a check is not run to see whether the number of children entered in the infotype Family / Related Person (0021) corresponds with the number of children entered in the field No.children in the infotype Personal Data (0002).
National Features
Family/Related Person (Infotype 0021): Country Specific Features Argentina
Infotype 0397: Family/Related Person (Brazil)
Family/Related Person (Infotype 0021): Country Specific Features Japan
Family/Related Person Infotype (0021) (Austria)
Family/Related Person Infotype (0021) (Switzerland)
Infotipo 'Familia/personas de referencia' (0021) (España)