How to write elegiac couplet when uncle dies and nephew dies?

The first pair of couplets should be written: Uncle wrote a pair of couplets through the ages: my nephew's son (without surname) can write "daughter-in-law" on the left when he is married, and when he has a child, he will make the whole family cry.

As the saying goes, my uncle is the biggest in the world. My uncle is the most distinguished guest of my nephew's family, and he is also a particularly influential person of my nephew's vitality. When my uncle passed away, as a nephew, I not only knelt in the shed to mourn, but also sent a wreath to express my pain and nostalgia for the sudden death of the old man.

As an indispensable etiquette, elegiac couplets are sent with wreaths. If the nephew is not married, he will be divided into two parts directly. Last section: Uncle is eternal. Next paragraph: nephew XXX bows.