Mildi
Mildi is a short form of a Norse masculine name containing the stem of mildr (mild), cognate with Anglo-Saxon Milda.
Reference:
Mildi [Hugh Smith 1928 English Place-Name Society 5: 181].
Stem:
MILDR, mild, milt = mild, gentle, graceful [Guðbrandur Vigfússon 1874 An Icelandic-English Dictionary, 1st edition, page 428].
Suffix:
“Short forms of names in Class A formed by the addition of the suffixes -i (masc.) or -a (fem.) to one or other of the elements” [Gillian Jensen 1968 Scandinavian Personal Names in Lincolnshire and Yorkshire, page xxxi].
Evidence:
The place-name Mildebi, recorded in 1086, is belived to mean “Mildi’s farm” [Hugh Smith 1928 English Place-Name Society 5: 181].