Definition of "tho"

Tho went I near and found Master Reynard, that had left that he first read and sang, and began to play his old play.

1481, William Caxton, The History Reynard the Foxː

Tho to a hill his faynting flocke he ledde.

1579, Immeritô [pseudonym; Edmund Spenser], “Ianuarie. Aegloga Prima.”, in The Shepheardes Calender: […], London: […] Hugh Singleton, […]; reprinted as H[einrich] Oskar Sommer, editor, The Shepheardes Calender […], London: John C. Nimmo, […], 1890,

Tho, her avizing of the vertues rare / Which thereof spoken were, she gan againe / Her to bethink of that mote to her selfe pertaine.

1590, Edmund Spenser, “Book III, Canto II”, in The Faerie Queene. […], London: […] [John Wolfe] for William Ponsonbie

Tho I gan closely on his person look.

1642, Henry More, Song Soulː

I wonder now when I will find time to read it but it is a treasure anyway tho heavy in my knapsack, […]

2009, John Hough, Seen the Glory: A Novel of the Battle of Gettysburg‎, Simon and Schuster, page 121