somnambulist

If you ever find yourself standing in the backyard in your pajamas at 4:00 in the morning and wondering how you got there, you may be a somnambulist — someone who walks in her sleep.

In Roman mythology, Somnus was the god of sleep; the Greeks called him Hypnos. His mother was Night (Nix) and his brother was Death (Thanatos). He lived in a dark cave and presumably never had to get up in time for school.

Definitions of somnambulist
1

n someone who walks about in their sleep

Synonyms:
noctambulist, sleepwalker
Type of:
sleeper, slumberer
a rester who is sleeping

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