We love the name but our dog is called [name_f]Daisy[/name_f] so really don’t feel like I can use it 
[name_f][/name_f]. I know I could but I wouldn’t, to me will confuse the doggo and my first daughters name then feels ‘left out’, so any similar/alternatives please 
[name_f]Sib[/name_f] name [name_f]Heidi[/name_f]
With [name_f]Heidi[/name_f], other M names:
[name_f][/name_f][name_f]Molly[/name_f]
[name_f][/name_f][name_f]Mila[/name_f]
[name_f][/name_f][name_f]Maci[/name_f]
[name_f][/name_f][name_f]Mae[/name_f]
[name_f][/name_f][name_f]Maeve[/name_f]
A few others with [name_f]Heidi[/name_f]:
[name_f][/name_f][name_f]Cora[/name_f]
[name_f][/name_f][name_f]Leslie[/name_f]
[name_f][/name_f][name_f]Flora[/name_f]
[name_f][/name_f][name_f]Vera[/name_f]
[name_f][/name_f][name_f]Isla[/name_f]
Hopefully these help 
[name_f]Love[/name_f] [name_f]Heidi[/name_f] and [name_f]Maeve[/name_f] together!!!
More M names to go with [name_f]Heidi[/name_f]:
[name_f][/name_f][name_f]Maylee[/name_f]
[name_f][/name_f][name_f]Marley[/name_f]
[name_f][/name_f][name_f]Madelyn[/name_f]
More names in general to go with [name_f]Heidi[/name_f]:
[name_f][/name_f][name_f]Rose[/name_f]
[name_f][/name_f][name_f]Ella[/name_f]
[name_f][/name_f][name_f]Lucy[/name_f]
[name_f][/name_f][name_f]Emilia[/name_f]
[name_f][/name_f][name_f]Sofia[/name_f]
[name_f][/name_f][name_f]Clara[/name_f]
[name_f][/name_f][name_f]Isabelle[/name_f]
[name_f][/name_f][name_f]Ruby[/name_f]
[name_f][/name_f][name_f]Zoe[/name_f]
[name_f][/name_f][name_f]Tatiana[/name_f]
[name_f][/name_f][name_f]Sarah[/name_f]
[name_f][/name_f][name_f]Rosalie[/name_f]
[name_f][/name_f][name_f]Victoria[/name_f]
[name_f][/name_f][name_f]Emma[/name_f]
[name_f][/name_f][name_f]Sophie[/name_f]
[name_f][/name_f][name_f]Leia[/name_f]
[name_f][/name_f][name_f]Elsa[/name_f]
[name_f][/name_f][name_f]Coralie[/name_f]
[name_f][/name_f][name_f]Vivian[/name_f]
[name_f][/name_f][name_f]Genevieve[/name_f]
Thank you! Lots of the lovely Ms you’ve suggested are in use by close family/friends making it a little tricker, all lovely though
Ooh interestingly I love [name_f]Miley[/name_f] and [name_f]Madison[/name_f] which are very similar to some of your suggestions 
[name_f][/name_f] thank you
Names like Maisie…
[name_f][/name_f][name_f]Marcy[/name_f]
[name_f][/name_f][name_f]Libby[/name_f]
[name_f][/name_f][name_f]Eliza[/name_f]
[name_f][/name_f][name_f]Sadie[/name_f]
[name_f][/name_f][name_f]Zadie[/name_f]
[name_f][/name_f][name_f]Mabel[/name_f]
[name_f][/name_f][name_f]Mavis[/name_f] (you could[name_f][/name_f] call her [name_f]Maisy[/name_f] down the line?)
[name_f][/name_f][name_f]Poppy[/name_f]
[name_f][/name_f][name_f]Pippa[/name_f]
[name_f][/name_f][name_f]Flora[/name_f]
[name_f][/name_f][name_f]Mollie[/name_f]
[name_f][/name_f][name_f]Amelie[/name_f]
[name_f][/name_f][name_f]Tansy[/name_f]
[name_f][/name_f][name_f]Etta[/name_f]
[name_f][/name_f][name_f]Lois[/name_f]
[name_f][/name_f][name_f]Elspeth[/name_f]
Names in a similar style to [name_f]Maisie[/name_f]:
[name_f][/name_f][name_f]Rosie[/name_f]
[name_f][/name_f][name_f]Sunny[/name_f]
[name_f][/name_f][name_f]Elsie[/name_f]
[name_f][/name_f][name_f]Betsy[/name_f]
[name_f][/name_f][name_f]Josie[/name_f]
[name_f][/name_f][name_f]Mercy[/name_f]
[name_f][/name_f][name_f]Tess[/name_f]
[name_f][/name_f][name_f]Joanie[/name_f]
[name_f][/name_f][name_f]Nellie[/name_f]
[name_f][/name_f][name_f]Susie[/name_f]
[name_f][/name_f][name_f]Bonnie[/name_f]
[name_f][/name_f][name_f]Willa[/name_f]
[name_f][/name_f][name_f]Thea[/name_f]
[name_f][/name_f][name_f]Gemma[/name_f]
[name_f][/name_f][name_f]Romy[/name_f]
[name_f][/name_f][name_f]Cleo[/name_f]
[name_f][/name_f][name_f]Margot[/name_f]
[name_f][/name_f][name_f]Birdie[/name_f]
[name_f][/name_f][name_f]Penny[/name_f]
[name_f][/name_f][name_f]Maple[/name_f]
[name_f][/name_f][name_f]Winnie[/name_f]
[name_f][/name_f][name_f]Hattie[/name_f]
[name_f]Coco[/name_f]
[name_f][/name_f][name_f]Jocelyn[/name_f]
[name_f][/name_f][name_f]Josephine[/name_f]
[name_f][/name_f][name_f]Josie[/name_f]
[name_f][/name_f][name_f]Katherine[/name_f]
[name_f][/name_f][name_f]Lexi[/name_f]
[name_f][/name_f][name_f]Maggie[/name_f]
[name_f][/name_f][name_f]Margot[/name_f]
[name_f][/name_f][name_f]Marilyn[/name_f]
[name_f][/name_f][name_f]Matilda[/name_f]
[name_f][/name_f][name_f]Melissa[/name_f]
[name_f][/name_f][name_f]Molly[/name_f]
[name_f][/name_f][name_f]Rosie[/name_f]
[name_f]Mary[/name_f]!
[name_f][/name_f][name_f]Maisie[/name_f] is traditionally a diminutive of either [name_f]Mary[/name_f] or [name_f]Margaret[/name_f]. And honestly, [name_f]Mary[/name_f] feels fresh and surprising when used these days as a first name these days.