Elwin Estermont is the son of Lord Aemon Estermont and Jeyne Estermont (Lannister).
Family
Aemon Estermont, father
Jeyne Estermont, mother
Bennet Estermont, brother
Martin Estermont , brother
Wimarc Estermont, brother
Elena Estermont, sister
Katherine Estermont, sister