OLENDORFFS OF MISSOUR/HELLINGERS OF INDIANA & TEXAS

I AM RESEARCHING SEVERAL LINES AT THIS TIME WHICH INCLUDE MY PARENTS' FAMILIES. THE NAMES I AM RESEARCHING ARE OLENDORFFS FROM MISSOURI. THEY CAME FROM GERMANY IN MID 1850'S AFTER THE FATHER PASSED AWAY IN GERMANY. THE MOTHER (MAGDELENA BEHRENS) MARRIED AGAIN TO A MAN WITH THE LAST NAME OF MEYER. WHILE IN THE CIVIL WAR, MAGDALENA'S SONS WENT BY CONRAD & JOSEPH MEYER. I AM TRYING TO FIND OUT IF THERE WERE MORE SIBLINGS.
I AM ALSO LOOKING FOR HELLINGER FROM INDIANA. HE WAS MY GREAT GRANDFATHER STEPHEN AND WAS BORN IN ST ANTHONY INDIANA IN 1850. HIS FATHER SEEMS TO HAVE BEEN JOSEPH HELLINGER. HE ALSO SERVED IN THE CIVIL WAR BUT WAS IN A REGIMENT FROM OHIO. I KNOW THERE ARE STILL SOME HELLINGERS STILL IN SOUTHERN INDIANA AND I WOULD ENJOY HEARING IF WE MAY BE RELATED.