Relative Definition
A relative is defined as a person who is related to the participant by blood, adoption, or marriage, which include any of the following:
 
Aunt
Cousin (first cousin, first cousin once removed)
Grandparent (grandmother, grandfather, great, great-great, and great-great-great grandparent)
Nephew
Niece
Parent (mother, father)
Relative (other than grandparent) of prior generation with the prefix grand, great, or great-great
Sibling (sister, brother)
Stepparent (stepmother, stepfather)
 
NOTE The parent of a stepparent is not considered a relative.
 
Uncle
Stepsibling (stepsister, stepbrother)