I have a few, and all have names that start with K because, after the first was Kenny the Kenmore and the second (a 15-91) was Kathryn named for my grandmother, I was "on a roll". And I alternate their names from male to female, like hurricanes, as I acquire them.
Kenny (Kenmore)
Kathryn (Singer)
Kyle ( Brother, computerized, gave to my DIL)
Kelly (Janome)
Kirk (Brother, mechanical)
Kay (because my DH was tired of my hinting around for two years for this Janome 8200 and he finally said "OK" to ANOTHER MACHINE)
Kenji (my newest Kenmore, my second Kenmore, very muscular; someone on here suggested the name Kenji because it means "second son" in Japanese)