Garter Collar is in Garter Knights.
In 1546 Unknown Painter. Italian. Portrait of Henry Howard Earl of Surrey [aged 30] wearing his Garter Collar and Leg Garter. His right 
Thomas of Brotherton 1st Earl Norfolk 1300 1338 Arms, his left 
Thomas of Woodstock 1st Duke of Gloucester Arms.
In 1559 Hans Eworth [aged 39]. Portrait of Anthony Browne 1st Viscount Montagu [aged 30] wearing a Garter Collar and St George Pendant.
In 1573 Unknown Painter. Portrait of Henry Sidney [aged 44] wearing his Garter Collar.
Around 1575 Unknown Painter. Portrait of Robert Dudley 1st Earl of Leicester [aged 42] wearing his Garter Collar.
Around 1576 Unknown Painter. Portrait of William Paulet 1st Marquess Winchester wearing his Garter Collar and Lord Treasurer Staff of Office.
Around 1580 based on a work of 1565.Unknown Painter. Portrait of Robert Radclyffe 5th Earl of Sussex [aged 6] wearing his Garter Collar and holding the Lord Treasurer Staff of Office.
In 1583 Unknown Painter. Portrait of Edward Clinton 1st Earl Lincoln [aged 71] wearing his Garter Collar.
Around 1605 John Critz [aged 54]. Portrait of King James I of England and Ireland and VI of Scotland [aged 38] with Garter Collar and Leg Garter.
Around 1615 Unknown Painter. Posthumous portrait of Philip Herbert 4th Earl Pembroke 1st Earl Montgomery [aged 30] wearing his Garter Robes and Garter Collar.
Abbot John Whethamstede’s Chronicle of the Abbey of St Albans
Abbot John Whethamstede's Register aka Chronicle of his second term at the Abbey of St Albans, 1451-1461, is a remarkable text that describes his first-hand experience of the beginning of the Wars of the Roses including the First and Second Battles of St Albans, 1455 and 1461, respectively, their cause, and their consequences, not least on the Abbey itself. His text also includes Loveday, Blore Heath, Northampton, the Act of Accord, Wakefield, and Towton, and ends with the Coronation of King Edward IV. In addition to the events of the Wars of the Roses, Abbot John, or his scribes who wrote the Chronicle, include details in the life of the Abbey such as charters, letters, land exchanges, visits by legates, and disputes, which provide a rich insight into the day-to-day life of the Abbey, and the challenges faced by its Abbot.
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In 1619 Daniel Mijtens [aged 29]. Portrait of William Knollys 1st Earl Banbury [aged 75] wearing his Garter Collar and Leg Garter.
In 1621 Daniel Mijtens [aged 31]. Portrait of King James I of England and Ireland and VI of Scotland [aged 54] wearing his Garter Collar and Leg Garter.
In 1630 Daniel Mijtens [aged 40]. Portrait of Thomas Howard 14th or 21st Earl of Arundel 4th Earl of Surrey 1st Earl Norfolk [aged 44] and wearing his Garter Collar.
In 1634 Daniel Mijtens [aged 44]. Portrait of Philip Herbert 4th Earl Pembroke 1st Earl Montgomery [aged 49] wearing his Leg Garter and Garter Collar.
Around 1634 Anthony Van Dyck [aged 34]. Portrait of James Stewart 4th Duke Lennox wearing his Leg Garter and Garter Collar.
Samuel Pepys' Diary. 9th October 1660. This morning Sir W. Batten [aged 59] with Colonel Birch [aged 45] to Deptford, to pay off two ships. Sir W. Pen [aged 39] and I staid to do business, and afterwards together to White Hall, where I went to my Lord, and found him in bed not well, and saw in his chamber his picture1, very well done; and am with child2 till I get it copied out, which I hope to do when he is gone to sea.
Note 1. Peter Lely [aged 42]. Portrait of Edward Montagu 1st Earl Sandwich [aged 35] in his Garter Robes and Garter Collar.
Note 2. A figurative expression for an eager longing desire, used by Udall and by Spenser. The latest authority given by Dr. Murray in the "New English Dictionary", is Bailey in 1725.
Around 1661 Peter Lely [aged 42]. Portrait of Charles Stewart 6th Duke Lennox in his Garter Robes and Garter Collar.
Around 1673 Peter Lely [aged 54]. Portrait of Charles II King Scotland in his Garter Robes and Garter Collar.
Around 1675 Peter Lely [aged 56]. Portrait of George Villiers 2nd Duke of Buckingham [aged 46] wearing his Garter Collar.
Around 1678 Peter Lely [aged 59]. Portrait of Charles II King Scotland in his Garter Robes and Garter Collar and Leg Garter.
Around 1680 Willem Wissing [aged 24]. Portrait of King William III of England, Scotland and Ireland [aged 29] wearing his Garter Collar.
Around 1686 Willem Wissing [aged 30]. Portrait of Lawrence Hyde 1st Earl Rochester [aged 43] wearing his Garter Robes including the Garter Collar and holding his white Lord Treasurer Staff of Office.