Their posterity will continue for ever: They will always have descendants living. This is what Good News Translation means by “Their family line will go on forever.” In some languages this will be expressed as “They will always have children, grandchildren, and great-grandchildren for ever.”

And their glory will not be blotted out: Good News Translation is good here, but another approach is “and nothing can ever erase [or, destroy] their fame” or “and each new generation will honor them [the ancestors].”

Quoted with permission from Bullard, Roger A. and Hatton, Howard A. A Handbook on Sirach. (UBS Helps for Translators). New York: UBS, 2008. For this and other handbooks for translators see here.