since microfilms of all parish records of Altach are in the Landesarchiv of Bregenz I took out a few data of your ggmother M.M.Ender. In this files she got married on 13.2.1886 to Georg Hoegler. Hoeglers father came from Krain (today Slovenia) to Bregenz and started a business as a fotographer.
Altach was a very small village in the 19. century therefore there were only a few surnames and almost all the people were related somehow,. So don't be surprised about the recurrence of the same names.
Josef Peter Ender, farmer, b. 7.2.1835 Altach, d. 26.8.1907
>>his p: Josef Anton Ender, taylor, b.1790
Katharina Giesinger, b. 1809
Anna Maria Giesinger, b. 2.8.1842 Altach, d.10.5.1900
>>her p: Johann Georg Giesinger
Maria Magdalena Ender (!)
Josef Peter und Anna Maria got married on 13.5.1862
Hope this is helpful for you.