No. Different linguistic root entirely. English vocabulary is not really subject to rational analysis — the words are derived from so many different tongues, the spellings have changed over the years, and many of the meanings have been altered as well.
You can research these questions yourself.
1590s, "compact, trim" (of a ship), especially "protected from the weather," perhaps from a Scandinavian source such as Old Norse snoggr "short-haired," Old Swedish snygg, Old Danish snøg "neat, tidy," perhaps from PIE *kes- (1) "to scratch" (see xyster). Sense of "in a state of ease or comfort" first recorded 1620s. Meaning "fit closely" is first found 1838. Expression snug as a bug in a rug attested by 1769; earlier snug as a bee in a box (1706).
"Schnucke" actually is the name of a moorland sheep from northern Germany ("Heidschnucke").
The 17th century low-German Snukke is thaught to be a sound painting word formation (copying the bleating or the eating noise of the sheep).
Fri 21 Jun, 2019 11:40 pm
There's at least one song about it.
Probably related to a group of chiefly German Low German and Central German dialect verbs schnucken, schnuckeln, and variants. These verbs mean “to eat sweets”, “to suck (like a baby)”, occasionally “to kiss”, all of which senses suit the noun perfectly.