There are only about 40 Senffs in the Texas Vital Record Indexes.Four show up in Nacogdoches.Several Senffs are in Hamilton and Travis counties.
Dorothy is probably his wife and the girls are probably his kids.None were not born in Texas. If these girls are Tom's then he arrived in Texas after 1951.
Social Security Death Indexes Name Birth Death Last Residence Last Benefit SSN Issued TOM B SENFF19 Jan 1918 10 Oct 1988 75961 (Nacogdoches, Nacogdoches, TX) (none specified) 462-66-4486 Texas DOROTHY SENFF25 Jan 1920 Apr 1986 75963 (Nacogdoches, Nacogdoches, TX) (none specified) 464-20-4532 Texas
Texas Vital Record Indexes ALL NAME INDEXEVENTSEXDATECOUNTYHUSBANDBORN1,BORN2,ID Senff Tom Prewitt Dea088M1988-10-11Nacogdoches Senff DorothyDea086F1986-04-08Nacogdoches Senff Deborah BMar073FM1973-05-26Nacogdoches Covin Ben P1951,1950#048913 Senff Suzanne CMar069FM1969-06-07Nacogdoches Thompson Ronald D 1946,1948#058624 The above data is also at the county site.
You might search www.switchboard.com for their telephone.