Old English sunnebeam; see sun (n.) + beam (n.). As "cheerful person" from 1886.
sump
sumpter
sumptuary
sumptuous
sun
sunbeam
Sunbelt
sunburn
sunburst
sundae
sun-dance
)window.location='https://www.paypal.com/cgi-bin/webscr?cmd=_donations&business=byronic106@yahoo.com&lc=US&item_name=Donation+to +Help+Keep+Etymonline+Free+and+Open&no_note=0&cn=&curency_code=USD&bn=PP-DonationsBF:btn_donateCC_LG.gif:NonHosted'){kind=link}