Of whom so dear — Son

Of whom so dear ¹
The name to hear
Illumines with a Glow
As intimate－as fugitive
As Sunset on the snow－

(F.1533/J.1504)

[1, 2] so dear, to hear:: name of one's son to hear.
[3] Illumines, Glow:: a hint on sun and son.
[4] intimate, fugitive:: a son escaped (home, parents) like a fugitive. A dear one as intimate as fugitive is the key.
[5] Sunset:: decline of the parents. snow:: coldness, apathy of the son.