"Close kinship" refers to a strong and intimate bond between people who are related, usually family members. It implies a deep connection and understanding between them. Full definition
This would mean not only a close relationship between David and Joab (and the same relationship between David and Amasa) but an even closer kinship between Joab and Amasa. (religion-online.org)
From this perspective, one is amazed to discover Schweitzer's close kinship with his predecessor Martin Kähler. (religion-online.org)
(Silver Spoon and Regret do not claim the same close kinship of their respective owners, but nonetheless there is a bloodline relationship going back eight generations. (si.com)