For Wightman/Whitman: Below I have included my direct line of generations. If twins are known, the children's names are next to their father.
Feel free to add the twins for your line, start from the connection with the generation listed below. Include dates when possible and if not living.
Most often; when twins are born into a family line, two generations will be skipped before another set of twins are born, but not always.
1st George Wightman b. abt. 1424
2nd Thomas Wightman b. abt. 1454
3rd Richard Wightman b. abt. 1484
4th William Wightman b. abt. 1505
5th John Wightman b. abt. 1536
6th Edward Wightman b. 20 Dec 1566 - twin children Karin & Maria Chr. 27 Feb 1603
7th John Wightman b. 7 Jan 1598
8th George Wightman b. 4 Nov 1632
9th George Wightman b. 8 Jan 1673
10th Samuel Wightman b. 1699
11th Benjamin Wightman b. 2 Nov 1727 - twin children George & Jeremiah b. 8 May 1760, George and Jeremiah at this time are only possible twins, due to only having a date of birth for Jeremiah as being born abt. 1760
12th George Wightman b. 8 May 1760- twin children Joseph & Ann b. 24 Mar 1800
13th Daniel Whitman b. 17 Oct 1807
14th Charles Otis Whitman b. 1840 - twin children Seth & Sylvester
15th Seth Whitman b. 5 Jul 1871
16th Glenn F. Whitman b. 11 Apr 1914
17th Glenn E. Whitman - twin children Synthia & Sylvia