Archiver > GENEALOGY-DNA > 2010-03 > 1268962157

From: Robert Tarín <>
Subject: Re: [DNA] Expected NPE's Over 800-1000 Years
Date: Thu, 18 Mar 2010 20:29:17 -0500
References: <>
In-Reply-To: <>

You can use this tool I created to determine the likelihood for different
generations and non-paternity rates.


On Thu, Mar 18, 2010 at 1:37 PM, <> wrote:

> We have 22 Britton families in our project. One is known to be the
> result of a recent NPE and another may be the result of an 18th century
> NPE.
> I think I've seen estimates somewhere about the number of NPE's likely to
> occur over a certain period of time and am wondering whether there is any
> method I can use to estimate how many of these 21 lines are likely to be
> NPE's and how many are likely to have used the name Britton since surnames
> were adopted.
> At present only one line (mine) goes back to a known 17th century ancestor
> and we have tested lines of descent from two of his sons, but another line
> probably goes back at least that far, a third goes back to the mid-18th
> century, and a couple of others go back to c 1800.
> Lindsey
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