Hi!
Your little ones are very cute!
If you don't know the gender yet, you can go for themed names - sweets, foods; herbs or plants, trees and shrubs; animals or birds; clouds, star constellations or astronomic phenomenons; Indian tribes; rivers; car or motorcycle brands; fashion brands; musical expressions (I don't think we've ever had those, like a tremolo etc.) or music groups. Names taken from word in your favourite song, film or series or Comics animal characters etc...
If you want to go for proper names, either go for unisex choices or choose a girl and a boy name each for later on and just give them a nickname for the time being until you know more about them and their individual personalities.
My Tegan was initially called "Syndod", Welsh for surprise, until I was sure whether she would be a Tegan Syndod (f) or a Tecwen Syndod (m) - both names translate as "beautiful surprise".
When you translate the Welsh names of my piggies, I have got a Butterfly and a Skylark; Poppy, Willow, Rose, Primrose, Foxglove and Flowers; piggies called Sunshine, Moonlight, Sunwarmed, Little Fire or Nightsong and Dusky; Lively, Happy and Merry; my coronets are/were Love, Darling, Loving and Blessed Love; I have an orphan that is Much Loved and one whose name means Beloved. I have My Lovely One, White Seas and a (black) Pearl. My husboars are Battle Prince, Eminent, Noble and Little Splendid Lord or Oak Prince. Lady, Bright . Harp (for her loud voice and ear splitting wheek) and Chicken (for her bum end) were nicknames that have stuck. Some have just Welsh versions of normal personal names, especially piggies that have come here with a well established name.