Second degree of consanguinity

(1) an ancestor or descendant of the whole or half blood; (2) a brother or sister of the whole or half blood; or
The chart below helps to explain the idea of degrees of separation
Sisters First Cousins Second Cousins 8 Third Cousins Children 3 Nephews& 5 First Cousins Nieces Once Removed 7 Second Cousins Once Removed Third Cousins Once Removed 2 Grandchildren 4 Grand Nephews 6 8 & Nieces First Cousins Twice Removed Second Cousins Twice Removed Third Cousins Twice Removed 3 Great 5 7