Using a Surname Distribution tool found at nationaltrustnames.org.uk I have been able to make an initial analysis of the Windlow (and its variants) distribution in 1881.
My findings were:
Windlow doesn’t appear but Winlow does!
Most are in Sunderland, then Durham and Newcastle Upon Tyne, which is where I would expect them to be.
Surprisingly, there appears to be a small number of Winlow’s in the Doncaster area.
There is also a Winlo surname appearing in Harrow.
My findings were as follows:
Windlow - the only site having anything on this surname was publicprofiler.org/worldnames which showed 0.14 Frequency Per Million (FPM) in USA and 0.04 FPM in UK
On the website Forbears, I found one statistic which showed in Australia in 2014 there were 22 incidences of the Windlow surname. A frequency of 1: 1,071,191 people.
So I looked at possible variants:
Winlow - 4.1 FPM in UK with a strong distribution of people in the same area (North) as Windlow. Winlow was also found in other areas of the UK to a lesser frequency. Winlow was also found in Canada 0.23 FPM and USA 0.14 FPM
Wyndlow - Canada 0.23 FPM (Ontario 3.16 FPM)
Windelow - Denmark 2.93 FPM and USA 0.04 FPM
taliesin-arlein.net had data for Winlow only:
No matches were found on either site for Windlo
Variants - what is a variant?