Tenn. Code Ann. § 34-1-120: When people may be appointed fiduciary - Eligible persons

No personal representative of an estate, any part of which is distributable to a minor, except a parent, grandparent, sibling of the minor or person named by the testator to be guardian, shall be appointed the fiduciary for the minor until the personal representative has first settled its accounts as personal representative. No personal representative of an estate, any part of which is distributable to a person with a disability, except a parent, spouse, child, grandchild, grandparent or sibling of the person with a disability, shall be appointed the fiduciary for the person with a disability until the personal representative has first settled its accounts as personal representative.