Definition of "Martin"

Expect Saint Martin's summer, halcyon days, / Since I have entered into these wars.

1591 (date written), William Shakespeare, “The First Part of Henry the Sixt”, in Mr. William Shakespeares Comedies, Histories, & Tragedies […] (First Folio), London: […] Isaac Iaggard, and Ed[ward] Blount, published 1623, [Act I, (please specify the scene number in lowercase Roman numerals)]

Luther was not born in the year 1483, but in 84; and not on the 22nd day of October, but on the 10th of November, the eve of Martinmas day, from whence he had the name of Martin. - - - Now you see, brother Toby, he would say, looking up, "that christian names are not such indifferent things;" - Had Luther here been called by any other name but Martin, he would have been damned to all eternity - Not that I look upon Martin, he would add, as a good name - far from it - 'tis something better than a neutral, and but a little - yet little as it is, you see it was of some service to him.

1767 Laurence Sterne, Tristram Shandy, Book IV ( Slawkenbergius's Tale )

What splendid names for boys there are! / There's Carol like a rolling car, / And Martin like a flying bird,/

1933, Eleanor Farjeon, “Boys' Names”, in Over the Garden Wall, Faber and Faber, page 90

Martin was pretty dull as names went but 'Alex Blake' had a certain dash to it. His publishers hadn't considered Martin's own name to be 'punchy' enough.

2006, Kate Atkinson, One Good Turn, Black Swan, published 2007, page 81