When
Keroppi was born in the year
1987, his parents named him
Hasu No Ue Keroppi which means in
English Keroppi on the Lily Pad, but as he's grown into mischievious sub-teen frog he has become known as simply
Keroppi.
Keroppi is one of three triplets, his siblings being Koroppi and Pikki.
You can read all about his friends and family at Donut Pond.