I found this freeware program which makes a family tree similar to the one which appears in M2TW. It helps to visualize your faction family trees and birth years. The graphic is the closest I've seen to the way M2TW presents the same info.

It helps to see the ages of offspring, so you can adjust them to match your start date.

The program is a free download here: http://www.freewarefiles.com/program_16_174_34356.html

You can also make notes for each individual, which might also help when modding those annoying character_record and relative lines in the descr_strat. Sadly, there is no tool which will help actually make those two lines easier to handle.