Steve,

If, as Johanna found, Jacob OSTROFF's ex-wife was Mrs. Donna Notis, than this 1955 Florida marriage may be your Jacob OSTROFF marrying Donna Londy.

This info is from an index, so the actual certificate may show their parents names.

Florida, U.S., Marriage Indexes

Name:	Jacob Ostroff
Marriage Date:	1955
Marriage Place:	Dade, Florida, USA
Spouse:	Donna Londy
Certificate:	6910
Volume:	1535
Source:	Florida Department of Health

Also, this 1960 city directory listing may be him.  Jacob worked at
WPST TV.

Name:	Jacob Ostroff
Gender:	Male
Residence Year:	1960
Street Address:	3621 SW 35th St WH
Residence Place:	Hollywood; Dania, Florida, USA
Occupation:	Employee
Spouse:	Donna Ostroff
Publication Title:	Hollywood, Florida, City Directory, 1960

Happy Hanukkah,

Sherri Bobish

I could not find an obit.  I did find that arrangements for his burial were under the direction of IJ Morris at Star of David Cemetery of the Palm Beaches, West Palm Beach, FL.  You might try contacting the cemetery to obtain any info they might have. Found this by googling.  

I did find an obit in the Philadelphia Inquirer for 23 Sept. 1978 for Sherry Ostroff who died in Paris on 14 Sept. 1978.  She was the dtr of Mrs. Donna Notis and Mr. Jacob Ostroff, sister of Miss Michele Ostroff, stepdtr of Mr. Martin Notis, stepsister of Miss Leslie Notis.  Address of Donna and Martin Notis was given as 780 Lingo Dr. Warminster, PA.  She was buried at Shalom Memorial Park, Section David on Byberry and Pine Rds. source:  newspapers.com

The Philadelphia Inquirer for 1 Jan. 1969 lists marriage licenses and has one for Martin Leonard Notis age 38 to Donna Ostroff age 33.  source: newspapers.com

Johanna Becker
Newport, RI