Don Tietjen and James Tietjen were brothers who worked at Motorola for a long time as I see their names in a 1979 document about the Design Philosphy of the 680

Don Tietjen and James Tietjen were brothers who worked at Motorola for a long time as I see their names in a 1979 document about the Design Philosphy of the 6809 and in Motorola patents as late as 1995.