The churchbook of Kirchdorf - this place :
https://www.google.de/maps/dir//Samtgemeinde+Kirchdorf+Samtgemeindeb%C3%BCrgermeister,+Rathausstra%C3%9Fe+12,+27245+Kirchdorf/@52.5972172,8.8154582,9z/data=!4m9!4m8!1m0!1m5!1m1!1s0x47b0bc503b881cc5:0x8c76951b5cfd7947!2m2!1d8.83441!2d52.597548!3e2
shows a lot of "Ihlo" - but it seems not your ones :
Kirchdorf 1838
http://www.archion.de/p/236ebdc096/
there is no
heinrich.fredrich.albrecht.ihlo.16.11.1838.wehrenberg.16.12.1922.staken.
but his Wife was
Sophia Dorothea Elisabeth Hemken.
Their son
Heinrich Johan Wilhelm Ihlo, * 9.3.1866 in Staken
oo 24.8.1893 in Deblinghausen
Sophie Marie Meyer
see here :
https://www.ancestry.de/imageviewer/collections/61521/images/47954_deb%5Eh%5E002-00091?treeid=&personid=&hintid=&queryId=43e2a0778b2494409066ea8782070b93&usePUB=true&_phsrc=pXG2&_phstart=successSource&usePUBJs=true&pId=105028310
KB Kirchdorf 1836
.jojann.heinrich.wilhelm.ihlo.21.6.1836.wehrenberg.
no entry for this one
http://www.archion.de/p/e6f368f077/
karl.heinrich.gerhard ihlo2.8.1841.wehrenberg 22.5.1907.stelle.
not found in the churchbook of Kirchdorf
http://www.archion.de/p/3c8f0ea62c/
VG