As a Finnish person, this was quite fun!
in reply to a message by Antique_Cherub
I tried to make it realistic, choosing names that are common in each age group.
DH: (67) Olavi Mikael Harmaajärvi
DW: (58) Marjo Helena Harmaajärvi, née Vanhanen
DD1: (34) Sohvi Vilhelmiina Dalgaard, née Harmaajärvi
DS2: (33) Roope Oskari Harmaajärvi
DS3/DS4: (26) Otso Joakim Harmaajärvi & Lauri Oliver Harmaajärvi
DD2: (23) Anna-Liisa Ursula Harmaajärvi
---
DD1: (34) Sohvi Vilhelmiina Dalgaard, née Harmaajärvi
DH: (40) Mads August Dalgaard
DD: (15) Ellinor Loviisa Dalgaard
DD: (11) Ebba Camilla Dalgaard
AD/AD: (6) Astrid Mei Dalgaard & Viola Xiulan Dalgaard
---
DS2: (33) Roope Oskari Harmaajärvi
DW: (32) Saana Elina Malmivaara
DwD: (16) Eevi Alisa Malmivaara
DS: (8) Leo Santeri Harmaajärvi
---
DS3: (26) Otso Joakim Harmaajärvi
Dgf: (28) Karoline Linnea Sandvik
DS: (4) Odin Henrik Sandvik
DD: (2) Klara Aurora Sandvik
DS: (nb) Linus Johannes Sandvik
---
DS4: (26) Lauri Oliver Harmaajärvi
Dbf: (24) Arif Alfarsi
---
DD2: (23) Anna-Liisa Ursula Harmaajärvi
DD: (1) Iines Eleonoora Harmaajärvi
DH: (67) Olavi Mikael Harmaajärvi
DW: (58) Marjo Helena Harmaajärvi, née Vanhanen
DD1: (34) Sohvi Vilhelmiina Dalgaard, née Harmaajärvi
DS2: (33) Roope Oskari Harmaajärvi
DS3/DS4: (26) Otso Joakim Harmaajärvi & Lauri Oliver Harmaajärvi
DD2: (23) Anna-Liisa Ursula Harmaajärvi
---
DD1: (34) Sohvi Vilhelmiina Dalgaard, née Harmaajärvi
DH: (40) Mads August Dalgaard
DD: (15) Ellinor Loviisa Dalgaard
DD: (11) Ebba Camilla Dalgaard
AD/AD: (6) Astrid Mei Dalgaard & Viola Xiulan Dalgaard
---
DS2: (33) Roope Oskari Harmaajärvi
DW: (32) Saana Elina Malmivaara
DwD: (16) Eevi Alisa Malmivaara
DS: (8) Leo Santeri Harmaajärvi
---
DS3: (26) Otso Joakim Harmaajärvi
Dgf: (28) Karoline Linnea Sandvik
DS: (4) Odin Henrik Sandvik
DD: (2) Klara Aurora Sandvik
DS: (nb) Linus Johannes Sandvik
---
DS4: (26) Lauri Oliver Harmaajärvi
Dbf: (24) Arif Alfarsi
---
DD2: (23) Anna-Liisa Ursula Harmaajärvi
DD: (1) Iines Eleonoora Harmaajärvi