Sources

Kilyecatanbeg 1440 ER v, 79
Kilyecatanmor 1440 ER v, 79
Killecatanebeg 1449 ER v, 360
Killecatanemore 1449 ER v, 360
Killecatanebeg 1450 ER v, 407
Kilcatanemore 1450 ER v, 407
Kelcattenebeg 1498 RMS ii no. 2421
Kilquhattamebeg 1500 Act. Dom. Conc. ii, 459
Kilquhattanbeg 1506 RMS ii no. 2987
Kilquhattanmore 1506 RMS ii no. 2987
Kilquhattanebeg 1507 ER xii, 509
Kilquhattanmoir 1507 ER xii, 509
(James Stewart of) Kilchatane 1517 x 1534 RMS iii no. 1376
(James Stewart of) Kilchatane 1533 x 1534 RMS iii no. 1378
Joh. Stewart de Kilcattanmoir 1541 RMS iii no. 2489
(James Stewart of) Kilchattane 1540 x 1542 RMS iii no. 2583
Jacobi Stewart de Gilquhattane 1545 x 1547 RMS iv no. 50
Kilchattan Kilchattan-moir and of Kilchattan-wege 1548 x 1549 RMS iv no. 273
Litill Kilchattane 1556 x 1557 RMS iv no. 1139]
Kilchattane 1566 RMS iv no. 1731
Kilchattanemoir 1566 RMS iv no. 1731
Kilchattanebeg 1566 RMS iv no. 1731 Kilchattane 1588 RMS v no. 1541
40 solidat. terrarum ant. ext. de Littill Kilchattan 1588 RMS v no. 1541
5 marcatas terrarum ant. ext. de Mekill Kilchattane 1588 RMS v no. 1541
acram terre de Kilchattonmoir 1591 RMS v no. 1810
Niniano Stewart feodatario de Kilchattan 1596 RMS vi no. 440
Ninian<us> Stewart de Kilchattane 1610 x 1615 RMS vii no. 1206
Mekill Kilchattan 1610 x 1615 RMS vii no. 1206
Littill Kilchattane 1610 x 1615 RMS vol 7 no 1206
molendinum, terras molendinariis &c. de Kilchattan 1615 RMS vii no. 1232
acram terre de Kilchattounmoir cum molendino etc. 1618 RMS vii no. 1813
Ninian Stewart of Kilkatten 1649 Kingarth Session Bk. 6
Killchattan beg 1654 Blaeu/Bute
Killchattan M<ill> 1654 Blaeu/Bute
Bay of Killchattan 1654 Blaeu/Bute
the 8 merk land of Meikle and Little Killcattan 1661 RMS xi no. 84
3 mercatis terrarum de Litle Kilkatten 1664 Retours (Bute) no. 66
Kilcatten 1664 Retours (Bute) no. 66
Meikle Kilkatten 1664 Retours (Bute) no. 66
Litle Kilkatten 1664 Retours (Bute) no. 66
the Milne of Kilcatten 1665 Kingarth Session Bk. 36
the Burn of Kilcatten 1667 Kingarth Session Bk. 51
8 mercatis terrarum de 2 Kilcattans 1670 Retours (Bute) no. 70
John Galy in Mikl Kilcatten 1691 Kingarth Session Bk. 156
Kil-Chattan 1695 Martin 1703, 252
Killcattonmor c.1753 Roy [= Meikle Kilchattan]
Killcattonbeg c.1753 Roy [=Little Kilchattan]
Killcattonmill c.1753 Roy
Kilcattan 1820 Thomson/Buteshire
Kilcattan 1864 OS Name Book 4, 56
Kilcattan Bay Buts 1864 OS Name Book 4, 56
Kilcattan 1869 OS 6 inch 1st edn
Kilcattan 1869 OS 6 inch 1st edn
Kilcattan Bay 1869 OS 6 inch 1st edn
Kilcattan Mill 1869 OS 6 inch 1st edn
Little Kilcattan 1869 OS 6 inch 1st edn
Meikle Kilcattan 1869 OS 6 inch 1st edn

Cill Chatain: Watson 1926, 277

There is no evidence of the form for Bay here, but camas fits with the topography (a round bay) more than bàgh. This also fits with Kames ~ An Camas, which is roughly the same shape.