- I. R. R. 1/1709
- Ianssz., Ian (s. unter Jansz, Jean)
- Ileborgh von Stendal, Adam 1/2177
- Ilmann, Gottfried 2/1600
- Imbault (Verlag) 5/842
- Imhoff, Clara 1/1262
- Immel, Johann Jakob 3/157
- India, Sigismondo d' 5/642, 5/643, 5/644, 5/645
- Ingebrandt, Johann 3/28
- Ingegneri, Marc'Antonio 2/1418, 2/1453*, 2/2371 <> 3/2272 <> 5/319**, 5/646
- Innocenz XI. 5/571
- Ippolito Baccusi (s. unter Baccusi, Ippolito)
- Isaac, Heinrich (= Yzaac; Ysac; Arrigo Tedesco) 1/562, 1/563, 1/564, 1/565, 1/757, 1/1258, 1/2143 <> 2/933, 2/934, 2/963, 2/1002, 2/1344, 2/1407, 2/1422, 2/1426, 2/1429, 2/1431, 2/1432, 2/1433, 2/1434, 2/1435, 2/1450, 2/1451, 2/1906, 2/1908, 2/1916, 2/1929, 2/2340, 2/2362, 2/2365, 2/2389 <> 3/452, 3/454, 3/1374, 3/1378, 3/1799, 3/2219, 3/2234, 3/2247, 3/2263, 3/2264 <> 4/476 <> 5/305, 5/311, 5/327, 5/328, 5/335, 5/359, 5/360, 5/377
- Isnardi, Paolo 3/2213
- Isouard, Nicolò 4/18, 4/100
