It's helpful to know HOW you know these fellas to have been born in Chester Co....that is often a clue as to where one should be looking. So, that would be a help to know. Also, as Lancaster just came into being in 1729, anything before that date would be considered to have been in Chester, and included in Chester Records. I have transcribed a ton of land records of one kind or another, and they are all on the Chester site, mentioned in your Welcome Email, and on the pagenweb archives....check those to see what you can find, not forgetting to look for all the spellings of Neill you can think of, including O'Neill and Neal. I've looked in THE HISTORY OF CHESTER COUNTY PA, by Futhey and Cope, and found a few Neills, but nothing specifically... ditto for Callender, any spelling. I looked on the CD of area wills, with no real luck. I'm including one, simply because some of your names of interest are included; (I found nothing for Callender, any spelling....in Lanc Co. Chester, etc) NEILL, WILLIAM. Tredyffrin.March 23, 1819. April 7, 1820.To wife Margaret half of clear estate, real & personal.To my bro. Adam's 3 sons, William, Samuel & Alexander, $200 each, and to his 5 daus. $100 each; and to their mother Esther the amount of a legacy left by Thomas Neill for which I have Lewis Neill's note for $216. To the Great Valley Meeting £50. To Isabella, dau. of James Gamble $100. Rem. of estate to my 2 sisters familys in Ireland.Executors: Wife, Margaret Neill, Wm. Walley of Easttown & Alex. Kennedy. Wits: Jas. Gamble, Edward Davis, Samuel Brown. I found this will from Cumberland Co....I include it because of the names....and that Wm Neil is listed as the son in law of someone named Calender,,,,plus ties to Lancaster Co....I'm sending it along, in case you think it 'might' be whom you seek. CALENDER, ROBERT, Middlesex, Middleton. July 26, 1776/4 November 1776.Wife Frances.Only son Robert, minor.Lands on the Juniata River.Messrs. West and John Nixon of City of Philadelphia, merchants.Alexander Lowry of Donegal, Lancaster Co.William Chestnut.Lands "now called Indiana."Lands in Florida, near the Natchez, to be divided equally between all children, some under age.Directs to be buried "in burying ground at Carlisle, ... near place where I buried my former wife."Exs.: wife Frances Calendar, sons-in-law, William Niel of Baltimore, merchant and Dr. William Irvine of Carlisle and bro.-in-law Mathew Slough, Esq. of the borough of Lancaster.Wit: John Holmes, John Semple, Ephm. Blaine, Jas. Irwin.Codicil names mother-in-law, Mrs. Martha Gibson; sisters-in-lawJane and Ann Gibson and mother-in-law, Mrs. Elizabeth Jervis. I looked in the 1765 Chester Archives, and there are no Neils, but did find the following Neals; Henry, owned 140 acres in East Marlborough twp Henry, an inmate in Sadsbury twp Jno owned 300 acres in Thornbury twp Wm owned 44 acres in Londonderry twp and the following O'Neils; Arthur inmate at Uwchlan Francis inmate at Pikeland Henry inmate at East Bradford Jno lived in Tredyffrin I'm afraid I've batted zero this afternoon. S. " Capt William Neill is oldest of 5 brothers (that I know of) born in Chester Co. PA around 1725 - 1740. The brothers names are Alexandar Neill b 1732, Andrew Neill b 1734, James Neill b 1733 or 1730, John Neill b Abt1738 , and Samuel Neill b Abt 1740. Their father is also named William Neill b 4/12/1711 in Clare, County Downs, Ireland, married Sarah Callender (Callendar) in Lancaster Co.PA in 1730. William Neill (father) died in 1769 in Rowan Co. NC. I am looking for information on this line specifically the father of the elder William Neill born in Ireland. I don't know how to go back any farther to Ireland records nor how to find where and when the elder William Neill cane to America."