Your question is a direct hit for two detached branches I have recorded with very little information. I have:
(1) Anna Collier Hankins b1805 m Daniel Hankins b1805 and s/o Daniel and Elizabeth Hankins.
(2) Agnes Collier Hankins m Joseph William Hankins b1798 Kanawas, VA, s/o Daniel and Elizabeth Hankins.
Note that Daniel and Joseph William Hankins are brothers and also a brother of Rollen(sp?) Hankins. A biography can be found on FindaGrave here: https://www.findagrave.com/memorial/21925523/roland-hankins
----- Also, I found a record for Hankins men fighting in the Civil War in this publication: -----
Fall Creek Township, Henry County, Indiana in the War of the Rebellion, J. A. YOUNG
NEWCASTLE, IND.: Courier Co. Book and Job Printing Rooms, 1887
Although there are numerous pages of the Units they fought in, here is a summary of the Hankins in the book:
COMPANY E, 8TH INFANTRY
Pg 27: Hankins, Richard
Pg 32: Joseph Hankins
Pg 33: Richard Hankins
COMPANY H, 69th Infantry
Pg 50: Hankins, William B., Wounded at Richmond. Ky.; discharged Nov. 24, 1862. on account of wounds.(H, 69th Inf)
Pg 50: Hankins, William N., Mustered out with regiment.(H, 69th Inf)
Pg 52: Pvt William B Hankins, Discharged
Corporal Hankins, Absolem, COMPANY K, 105th INFANTRY. (MINUTE MEN) Mechanicsburg, Entered U.S. service in Company E, 9th Cavalry.
Private Hankins, Daniel, COMPANY K, 105th INFANTRY. (MINUTE MEN) Mechanicsburg, Entered U.S. service in Company H, 140th Infantry.
I have some other books to search through in order to try and fill in the blanks for the Indiana men. Would love to get our info together.