In my list of Civil War veterans from NY I find an Amos Otis who was in the 146th Regiment of the NY Infantry. He can't be the same Amos Otis listed below but might be related to him. I don't know if he died at Gettysburg.
I have an Captain Amos Otis b. 1780 and died 1814 of typhoid at Ft. Ann. (He was the son of Richard2 below). I find a Richard Otis Jr. b 9 Aug 1783 and d 9 Oct 1851 who married Eunice Huntley and settled in Ft. Ann, NY. This Richard was the son of Richard2 Otis b. 1744 and d. 5 Jan 1825 in Westfield, NY & buried in Wes Canaan (NY or NH?). This Richard2 was a Revolutionary War Patriot (see below). Another son was Major Sardis Otis 1789-1871. So Richard2 was the father of Cpt. Amos, Maj. Sardis and Richard Jr..
Notes from Kevin Otis RICHARD OTIS b. 1744 d. 1825, TANNER, SHOEMAKER, REVOLUTIONARY WAR PATRIOT He is the youngest son of nine children. His oldest brother James died when Richard was seven, his father, two aunts, and Grandfather died in 1754 when he was ten. The family moved from Montville to Colchester in Connecticut to live near his older brother John. Richard m. Mary Hinckley from nearby Lebanon Center. They resided at Lebanon but after the birth of their oldest son they left c. 1770 with an exodus of families to the settlements on the Connecticut River in New Hampshire near the Vermont border, locating at Marlow. This was the frontier with the area having extensive tanneries, it was common for a boys breaches to be made of deer hide, all other products of leather were produced including patent leather. In this field Richard forged a living. The valley and hills had recently been cleared of the French and Indian threat allowing for the safe migration of New England families. On the evening of the 2nd day of May 1777 dispatches were received by the committee of safety of this state, informing them that the garrison Ticonderoga, at the south end of Lake Champlain in New York, was in danger of being taken by the enemy. In June 1777 Cpl. Richard Otis signed up for active duty in Col. Benjamin Bellow's regiment of Walpole (near Marlow) under Capt. Samuel Canfield's company. Col. Bellow's regiment along with two other and parts of a third regiment totaling 326 men marched to reinforce Fort Ticonderoga. The English General Burgoyne with a large force of British and Germans had invaded from the north intending on taking Albany, New York and cutting off New England from the rest of the colonies. Cannons were hauled up nearby Mount Defiance forcing the Americans to evacuate Ticonderoga. Most of the militia from New Hampshire on finding that they could render no service immediately began returning home. However, the men had been ordered to join the Continental Army at Bennington where the main army had retreated. During these events the British General took advantage of the situation by spreading the rumor that the settlements of the Connecticut River were going to be attacked, increasing the general fear by not specifying where the attack would take place. Letters from Charleston, New Hampshire (Fort Number Four) and from the settlements of this time were asking for guns and reinforcements. The returning men, instead of following orders, went straight on home. No one from the New Hampshire militias joined the Continental Army. Gen. Burgoyne met his defeat at the battle of Saratoga, New York and Fort Ticonderoga was returned to American hands.
After the war between 1786 and 1789 Richard moved his family south of Fort Ticonderoga to the old settlement of Westfield, New York. The town was renamed Fort Ann in 1808 to honor a fort built there during the French and Indian war. On the 8th of July, 1777 as the Continental Army was falling back, a decisive battle was fought one mile from the fort on "Battle Hill" between Gen. Burgoyne and the 2nd New Hampshire regiment. The fort was burned to the ground during the retreat.
Why Richard moved his family to Fort Ann is not known, however; the area is beautiful with Lake George and Lake Champlain acting as byways for shipping. It is known that Washington County of Fort Anne became a byway for many New England families for later migrations west. Here, Richard bought a farm near the border of Vermont at Granville, New York. Richard and his sons built a sturdy house of quarried stone and tin roof. The house burned down in 1936 but the huge stones can be seen and the barn still stands.
Richard died on September 5, 1825 at age 81. Mary, one year later on August 8, 1826 at age 74. They are buried in the family plot in the North Granville burying grounds. This is a small burying ground northeast of the bridge in West Granville, New York.
Listed in Graves of Revolutionary Patriots Vol 3 R - L by Patricia Law Hatcher