Here are record heading for births in Friesland that I found online:
Geboorteakte Schiermonnikoog, 1881 Aangiftedatum 6 december 1881, akte nr. 26 Nicolaas Tilstra, geboren 4 december 1881 zoon van Douwe Folkerts Tilstra en Maria Theresia Ronner N.B. Vader overleden
1881 seems rather a late birthdate in order to have a son born on 11-4-1894...
Geboorteakte Oostdongeradeel, 1853 Aangiftedatum 8 oktober 1853, blad nr. 66 Klaas Tilstra, geboren 8 oktober 1853 zoon van Jacob Siedzes Tilstra en Siebrigje Pieters Wibalda wonende te Morra
This one seems more likely, but I would have expected a date closer to the 1860s...
Geboorteakte Oostdongeradeel, 1879 Aangiftedatum 29 juli 1879, blad nr. 54 Klaas Tilstra, geboren 28 juli 1879 zoon van Sieds Tilstra en Antje de Vries wonende te Morra
Again, rather a late birth date to have a son in 1894...
Geboorteakte Menaldumadeel Aangiftedatum 21 december 1860, akte nr. 236 Klaas Tilstra, geboren 19 december 1860 zoon van Dirk Martens Tilstra en Antje Tabes Winselaar
Geboorteakte Menaldumadeel Aangiftedatum 14 november 1863, akte nr. 309 Klaas Tilstra, geboren 13 november 1863 zoon van Dirk Freerks Tilstra en Lieuwkje klazes van der Kooi
The dates for the last two are about right I'll have to double check to see if there is a John Tilstra with the same parents born in a different area.There wasn't one born in Menaldumadeel, and I didn't see one for the other regions either (that doesn't mean there isn't one, just that I didn't see one).
Geboorteakte Barradeel Aangiftedatum 1 augustus 1862, nr. 123 Klaas Tilstra, geboren 1 augustus 1862 zoon van Simon Klases Tilstra en Tietske Meintes Jorritsma
Geboorteakte Barradeel Aangiftedatum 4 september 1865, nr. 188 Jorrit Tilstra, geboren 4 september 1865 zoon van Simon Klases Tilstra en Taetske Meintes Jorritsma
I don't know if 'Jorrit' can be translated as 'John', usually you see 'Jan' or 'Johannes', but the dates are right, and the father's name is 'Simon', same as Nicholas' son.It's typical for the first born son to have the same first name as the paternal grandfather.
Geboorteakte Wonseradeel Aangiftedatum 8 september 1855, blad nr. 133 Klaas Tilstra, geboren 8 september 1855 zoon van Folkert Klazes Tilstra en Martha Annes Feenstra
Geboorteakte Wonseradeel Aangiftedatum 25 februari 1858, blad nr. 26 Jan Tilstra, geboren 24 februari 1858 zoon van Folkert Klazes Tilstra en Martha Annes Feenstra
This Klaas Tilstra is in my line, but I don't think he ever moved away from Friesland.There are death records for him in the same town (Wons).
Well, that's all I could find in the birth records data.The birth records for Leeuwarden aren't online yet, and I have no idea how many Tilstras there will be in that list.My best guess given the data I've seen would be that Jorrit used the name John in the US.You might want to see if there are any ship lists that have Tilstras on them to see if that family came over between about 1870 and 1890.
In the mean time, I'll check to see if there are any marriage or death records for those two in the archives.
No marriage or death records for Jorrit in the Barradeel lists, and no death records for Klaas Tilstra in that list. However, there is a marriage records from 1888 between a Klaas Tilstra and Eeke Schaaf, and there is a death record for Eeke Schaaf in Barradeel in 1933, aged 67 and listed as married--meaning that her husband was still alive.I suppose it's conceivable that Klaas got married, went to America and never was able to retreive his first wife and took a second one here, but I wouldn't bet on that scenerio unless there were more compelling evidence.
If you want to do any online searching of that line yourself, http://www.ryksargyf.orghttp://www.ryksargyf.org is the address for the Frisian State Archives.Of course everything is written in Dutch, but you should be able to follow it fairly well.After clicking on 'Welkom', click on 'Onderzoek' (research), then on 'Stamboom Onderzoek' (pedigree research).Then you can choose which things you want to look up: geboorten is births, huwelijken is marriages, and overlijdens is death records.Familienamen 1811 is a list of all the family names that were registered in Friesland as decreed by Napolean, and 'BS' voor 1812 is a list of marriages taken from churches in each area.