Where does “mursennod” come from?

mursennod (Welsh) comes from Welsh od, from Middle English odde, from Old Norse oddi, from Old Norse -i, from Latin -ē, from Latin dis-, from Latin calceus, from Latin calx — small stone, pebble; gravel, rubble.

Ancestry of “mursennod”, step by step

mursennod traces back through two separate lines of ancestry.

via Welsh od

Step	Language	Word	Meaning
1	Welsh	od	odd, strange; odd
2	Middle English	odde	inflection of od: ## weak singular ## strong/weak...
3	Old Norse	oddi	odd, third or additional number; triangle
4	Old Norse	-i	th
5	Latin	-ē	ly; used to form adverbs from adjectives
6	Latin	dis-	asunder, apart, in two; reversal, removal;...
7	Latin	calceus	shoe
8	Latin	calx	limestone; chalk; the finish line
9	Ancient Greek	χάλιξ	small stone, pebble; gravel, rubble

via Welsh mursen

Step	Language	Word	Meaning
1	Welsh	mursen	coquette, female flirt
2	Old French	virgene	virgin
3	Latin	Virginem	—
4	Latin	Virgo	Virgo (constellation)

Every word from Ancient Greek χάλιξ →Every word from Latin dis- →Every word from Latin -ē →