grandgirln.
/ˈɡran(d)ɡəːl/, U.S. /ˈɡræn(d)ˌɡərl/ chiefly U.S. regional and colloquial.
A female grandchild; = granddaughter n.; cf. grandboy n.
ΘΚΠ
society > society and the community > kinship or relationship > kinsman or relation > grandchild > [noun] > grand-daughter
daughter daughtera1382
niecea1387
granddaughter1608
grandgirl1872
1872 C. L. Matéaux Raggles, Baggles, & Emperor vii. 39 I was staying in a village with my only grandgirl, Cecile.
1904 Sunday Post (Boston) 10 Apr. (Extra ed.) 45/2 As my 5-year-old grandgirl says to me when I am troubled or vexed—‘I wouldn't worry if I were you! Everything does come right!’
1977 P. J. Cooper & N. B. Allen Quilters 114 The other day my little grandgirl was here and she was occupyin' herself drawing while I quilted.
2013 Bakersfield Californian 8 Feb. 5/3 My dad is already thinking about arranging a piece of music that has his grandgirls playing piano, my husband on violin, me on cello and him singing.
This is a new entry (OED Third Edition, December 2015; most recently modified version published online March 2022).
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n.1872