Online Etymology Dictionary

font (1): "basin," O.E. font, from L. fons (gen. fontis) "fountain" (see fountain), especially in M.L. fons baptismalis "baptismal font."
font (2): "typeface," 1683, from M.Fr. fonte, fem. pp. of fondre "melt" (see found (2)). So called because all the letters were cast at the same time.
fount: 1593, probably a shortening of fountain, infl. by M.Fr. font "fount," first found in Shakespeare.
Aldine: type font, 1837, from Aldus Manutius (1450-1515), Venetian printer who used it in his popular editions of Gk. and Roman classics. His name is a L. form of It. Aldo Manuzio, short for Teobaldo. The device characteristic of Aldine books is a figure of a dolphin on an anchor.
Pegasus: winged horse in Gk. mythology, late 14c., from L., from Gk. Pegasos, usually said to be from pege "spring, font" (pl. pegai), especially in "springs of Ocean," near which Medusa was said to have been killed by Perseus (Pegasus sprang from her blood). But this may be folk etymology, and the suffix -asos suggests a pre-Gk. origin.
agate: 1560s, from M.Fr. agathe, from O.Fr. acate, from L. achates, from Gk. achates, the name of a river in Sicily where the stones were found. But the river could as easily be named for the stone. The earlier Eng. form of the word, achate (early 13c.), was directly from Latin. Figurative sense of "a diminutive person" (c.1600) is from the now-obsolete meaning "small figures cut in agates for seals," preserved in typographer's agate (1838), the U.S. name of the 5.5-point font called in Great Britain ruby. Meaning "toy marble made of glass resembling agate" is from 1843 (colloquially called an aggie).
old: O.E. ald (Anglian), eald (W.Saxon), from W.Gmc. *althas "grown up, adult" (cf. O.Fris. ald, Goth. alþeis, Du. oud, Ger. alt), originally a pp. stem of a verb meaning "grow, nourish" (cf. Goth. alan "to grow up," O.N. ala "to nourish"), from PIE base *al- "to grow, nourish" (cf. Gk. aldaino "make grow, strengthen," althein, althainein "to get well;" L. alere "to feed, nourish, bring up, increase," altus "high," lit. “grown tall,” almus "nurturing, nourishing," alumnus "fosterling, step-child;" O.Ir. alim "I nourish"). The usual PIE root is *sen- (cf. senior). A few IE languages distinguish words for "old" (vs. young) from words for "old" (vs. new), and some have separate words for aged persons as opposed to old things. L. senex was used of aged living things, mostly persons, while vetus (lit. "having many years") was used of inanimate things. Gk. geraios was used mostly of humans; Gk. palaios was used mostly of things, of persons only in a derogatory sense. Gk. also had arkhaios, lit. "belonging to the beginning," which parallels Fr. ancien, used mostly with ref. to things "of former times." O.E. also had fyrn "ancient," related to O.E. feor "far, distant" (see far, and cf. Goth. fairneis, O.N. forn "old, of old, of former times," O.H.G. firni "old, experienced"). The original O.E. vowel is preserved in Scots auld. The original comp. and superl. retained in particular uses elder, eldest, also alderman). Pseudo-archaic mock-antique variant olde is attested from 1927. Oldie "an old tune or film" is from 1940. First record of old-timer is from 1860. Expression old as the hills first recorded 1819. The good old days dates from 1828. Of old "of old times" is from c.1386. Old Glory for "the American flag" is first attested 1862. Old maid "woman who remains single well beyond the usual marrying age" is from 1530; the card game is attested by that name from 1844. Old man "husband, father, boss" is from 1854, earlier (1830) military slang for "commanding officer;" old lady "wife, mother" is attested from c.1775. Old English is attested from 1849 as a type of black-letter font.