Thank you very much! Would appreciate direct contact at
mlvermillion@cox.net. Very interesting that those named heirs are his siblings and brother-in-law. I have not examined the primary source or certificates, but brief written by Louis W. Kemp and posted at the Hertzein library references JDV's assigning his rights to Calder:
http://www.sanjacinto-museum.org/Herzstein_Library/Veteran_B...